Statistics Questions

urtis is a statistician who claims that the average salary of an employee in the city of Yarmouth is no more than 55 000 er year Gina his colleague believes this to be incorrect so she randomly selects 61 employees who work in Yarmouth a ecord their annual salary Gina calculates the sample mean income to be 56 500 per year with a sample standard leviation of 3 750 Using the alternative hypothesis Ha 55 000 find the test statistic t and the p value for the appropriate hypothesis test Round the test statistic to two decimal places and the p value to three decimal places Right Tailed T Table probability Degrees of Freedom 54 55 56 57 58 59 60 0 0004 0 0014 0 0024 0 0034 0 0044 0 0054 0 0064 3 562 3 135 2 943 2 816 2 719 2 641 2 576 3 558 3 132 2 941 2 814 2 717 2 640 2 574 3 554 3 130 2 939 2 812 2 716 2 638 2 572 3 550 3 127 2 937 2 810 2 714 2 636 2 571 3 547 3 125 2 935 2 808 2 712 2 635 2 569 3 544 3 122 2 933 2 806 2 711 2 633 2 568 3 540 3 120 2 931 2 805 2 709 2 632 2 567

Marty a typist claims that his average typing speed is 72 words per minute During a practice session Marty has a sample typing speed mean of 84 words per minute based on 12 trials At the 5 significance level does the data provide sufficient evidence to conclude that his mean typing speed is greater than 72 words per minute Accept or reject the hypothesis given the sample data below Ho 72 words per minute Ha 72 words per minute 0 05 significance level 20 2 1 p 0 018 Select the correct answer below Do not reject the null hypothesis because 2 1 0 05 Do not reject the null hypothesis because the value of z is positive Reject the null hypothesis because 2 75 0 05 Reject the null hypothesis because the p value 0 018 is less than the significance level a 0 05

Jacqueline a javelin thrower has a sample throw mean of 67 4 meters from 12 throws Jacqueline still claims that her average throw is 61 meters and the high average can be attributed to chance At the 1 significance level does the data provide sufficient evidence to conclude that Jacqueline s mean throw is greater than 61 meters Given the sample data below accept or reject the hypothesis Ho 61 meters Ha 61 meters 0 01 significance level 0 0 74 p 0 2296 Select the correct answer below 0 01 Do not reject the null hypothesis because the p value 0 2296 is greater than the significance level a O Reject the null hypothesis because the p value 0 2296 is greater than the significance level a 0 01 Reject the null hypothesis because the value of z is positive Reject the null hypothesis because 0 74 0 01 F

What is the p value of a two tailed one mean hypothesis test with a test statistic of zo 0 27 Do not round your answer compute your answer using a value from the table below Z 0 00 0 01 0 02 0 03 0 04 0 05 0 06 0 07 0 08 0 09 0 1 0 540 0 544 0 548 0 552 0 556 0 560 0 564 0 567 0 571 0 575 0 2 0 579 0 583 0 587 0 591 0 595 0 599 0 603 0 606 0 610 0 614 0 3 0 618 0 622 0 626 0 629 0 633 0 637 0 641 0 644 0 648 0 652 0 4 0 655 0 659 0 663 0 666 0 670 0 674 0 677 0 681 0 684 0 688 0 5 0 691 0 695 0 698 0 702 0 705 0 709 0 712 0 716 0 719 0 722 Provide your answer below

A politician recently made the claim that 47 of taxpayers from a certain region do not pay any income taxes Makayla is a journalist for an online media company and is testing the politician s claim for an op ed She randomly selects 159 taxpayers from the region to conduct a survey and finds that 73 of them do not pay any income taxes What are the null and alternative hypotheses for this hypothesis test Select the correct answer below Ho p 0 47 Ha p 0 47 Ho p 0 47 O O O O Ha p 0 47 Ho p 0 47 Ha p0 47 Ho p0 47 Ha p 0 47 FEEDBACK MORE INSTRUCTION SUBMIT

Marriage Proposals In a survey conducted by TheKnot com 1165 engaged or married women were asked about the importance of a bended knee when making a marriage proposal Among the 1165 respondents 48 said that the bended knee was essential a What is the exact value that is 48 of 1165 survey respondents b Could the result from part a be the actual number of survey subjects who said that a bended knee is essential Why or why not c What is the actual number of survey respondents saying that the bended knee is essential d Among the 1165 respondents 93 said that a bended knee is corny and outdated What percentage of respondents said that a bended knee is corny and outdated

Colton makes the claim to his classmates that less than 50 of newborn babies born this year in his state are boys To prove this claim he selects a random sample of 344 birth records in his state from this year Colton found that 176 of the newborns are boys What are the null and alternative hypotheses for this hypothesis test Select the correct answer below Ho p 0 5 Ha p 0 5 Ho p 0 5 O O O O Ha p0 5 Ho p 0 5 Ha p 0 5 Ho p 0 5 Ha p 0 5

A former residential complex was found to be a Superfund site polluted with several hazardous materials Tamela is an investigative journalist who would like to show whether the proportion of the residents of the complex who eventually di from cancer is greater than the regional average of 14 She randomly selects 54 residents who lived in the complex and finds that 12 of those residents eventually died from cancer Are all of the conditions for this hypothesis test met and if s what are the null and alternative hypotheses for this hypothesis test Select the correct answer below Although the proportion follows a binomial model with two independent outcomes and the data are selected at random the number of successes and the number of failures are not both greater than or equal to 5 Although the proportion follows a binomial model with two independent outcomes and the number of successes and the number of failures are both greater than or equal to 5 the data are not selected at random Although the data are selected at random and the number of successes and the number of failures are both greater than or equal to 5 the proportion does not follow a binomial model All of the conditions to conduct the hypothesis test have been met The null and alternative hypotheses are Of Ho p 0 14 Ha p 0 14 All of the conditions to conduct the hypothesis test have been met The null and alternative hypotheses are TT 014

Austin works in the marketing department for a large cable company Recently he heard that 56 of cable TV subscribers are considering dropping their cable TV subscription He tests the claim by randomly selecting a sample of cable TV subscribers and asking whether they are considering dropping their cable TV subscription Austin finds that 122 of the 224 he surveyed are considering dropping their cable TV subscription What are the null and alternative hypotheses for this hypothesis test Select the correct answer below O O Ho p0 56 Ha p 0 56 Ho p 0 56 Ha p 0 56 Ho p 0 56 Ha p0 56 Ho p 0 56 Ha p 0 56 F

A An airline company claims in a recent Advertiseme that more than 94 of passenger bluggage that is lo is recovered and reUnited with the customer with Iday Hunter is a graduate student stucking statistics For each research project Hunter wants to find out whether there is convincing evidence in Suppat of the Chuline company s clawn He randomly selects 315 passery of the atvire whose luggage was last by the Jorline and found that 276 of these passengers were reunited with their luggage within Idday Are All of the conditions for this hypotheus testmet and if so what are the Null and alternative hypothvas for this happothesis text Although the proportion follows a binonical model with he independent outrons and the data are Selected at random the number of successes and the number of farkas Are not both greater than or equal to 5 Although the proportion follows A binemial model with two independant outcomes and the number of successes And the Number of failures are both greater than of Equal to a the Jith are not Selected Athindon AVL 3 Although the latha Selected At Condom And the Dember of successes and the number of failures are both greater than or equal to 5 the proportion does not follow Abvenal All conditions to conduct the hypothesestest Have ben met matel H P 0 94 The Null And Alternative happenfesas Are 7 Ha P 094

Kylie works for a large nursery and is investigating whether to use a new brand of seeds The new brand of seeds advertises that 93 of the seeds germinate which is higher than the germination rate of the seeds she is currently using She will change over to this new brand unless the actual germination rate is less than what is advertised Kylie conducts an experiment by randomly selecting 76 seeds of the new brand and plants them She finds that 70 of those seeds germinated What are the null and alternative hypotheses for this hypothesis test Select the correct answer below Ho p 0 93 Ha p 0 93 Ho p 0 93 O O O O Ha p 0 93 Ho p0 93 H p 0 93 a Ho p 0 93 Ha p0 93 F

A hospital administrator claims that the proportion of knee surgeries that are successful is 87 To test this claim a random sample of 450 patients who underwent knee surgery is taken and it is determined that 371 of these patients had a successful knee surgery operation The following is the setup for this hypothesis test Find the test statistic for this hypothesis test for a proportion Do not round until final answer Round final answer to 2 decimal places Provide your answer below Ho p 0 87 Ha p0 87 Test Statistic

A researcher claims that the proportion of people over 65 years of age in a certain city is greater than 11 To test this claim a sample of 1000 people are taken and its determine that 126 people are over 65 years of age The following is the setup for this hypothesis test Ho p 0 11 Ha p 0 11 Find the test statistic for this hypothesis test for a proportion Round your answer to 2 decimal places Provide your answer below Test Statistic

Colin is a student in a statistics course looking to show whether the proportion of games played that are won by the visiting team in a certain professional lacrosse league is 50 Colin randomly selects 83 games from the past few seasons and find that 37 of the games were won by the visiting team What are the null and alternative hypotheses for this hypothesis test Select the correct answer below Ho p 0 5 Ha p 0 5 Ho p 0 5 O O O O Ha p 0 5 Ho p0 5 Ha p 0 5 Ho p 0 5 Ha p0 5

The owners of a supermarket chain are looking into the effectiveness of the supermarket s loyalty card program Specifically they would like to know if the percentage of shoppers in their stores who use the loyalty card has changed from 63 in 2014 Chloe works in the marketing department of the chain and is assigned to answer the owners inquiry She randomly selects 196 customers from various stores in the chain and finds that 114 use the loyalty card What are the null and alternative hypotheses for this hypothesis test Select the correct answer below Ho p 0 63 Ha p 0 63 Ho p 0 63 O O O O Ha p 0 63 p0 63 Ho Ha p 0 63 Ho p 0 63 Ha p0 63 E

An online store sells a variety of photo albums The albums range in photo capacity and orientation Horizontally Vertically Under 50 photos 50 photos or more 2 5 2 5 What is the probability that a randomly selected photo album is oriented horizontally and holds 50 photos or more Simplify any fractions

Resource representative claims that the proportion of employees earning more than 50 000 is less than 40 To test this claim frandom sample of 100 employees is taken and 305 employees are determince to eam more than 50 000 The following is the setup for this hypothesistest H Ho P 0 40 Ha PE 0 40 Find the p value for this hypothesis test for a proportion and round your answer to 3 decimal places The Following Table can be utilized which provides areas under the Standard Normal Curve Z 0 00 0 03 0 04 0 05 0 06 0 07 0 08 0 01 0 02 1 5 0 933 0 934 0 936 0 937 0 938 0 939 0 941 0 942 0 943 1 60 945 0 946 0 947 0 948 0 949 0 951 0 952 0 953 0 954 1 7 0 955 0 956 0 957 0 958 0 959 0 960 0 961 0 962 0 962 1 8 0 964 0 965 0 966 0 966 0 967 0 968 0 969 0 969 0 970 1 9 0 971 0 972 0 973 0 973 0 974 0 974 0 975 0 976 0 976 2 0 0 977 0 978 0 978 0 979 0 979 0 980 0 980 0 981 0 981 0 09 6 944 6 954 0 963 9 97

Apdice officer claims that the proportion of accidents that occur in the day time versus nighttime at a certan ntersection is not 35 To test this Cham random Sample of 500 accidents at this intersection was examined from police records it is determined that 156 accidents occured in the day The following is the setup for this hypothesis test Hop 0 35 Haip 0 35 Find the pvalue for this hypothesis test for a proportion and round your answer to 3decima 1 planes The following table can be utilized which provides areas under the Standard Normal Curve Z 0 00 0 01 0 02 0 03 0 04 0 05 0 0 1 90 07 0 0980027 8 031 0 0 84 42 0 24 0 06 0 025 1 8 0 036 0035 034 33 0 03 0 031 1 7 0 045 0 044 acto ao 0041 0 040 0 039 1 60 055 0 054 0 054 00 0 051 0 049 0 048 1 5 0 067 0 064 0 068 0 052 0 062 0 061 0 059 1 4 10 081 0 079 0 078 0 016 0075 10 014 0 072 43 0 01 0 08 0 09 0024 0 024 0 023 0 031 0 030 0 009 0 035 0 038 0 037 0 046 0 047 0 046 0 058 0 057 0 054 06 9 52

FO a A botanist at a nursery wants to inspect the health of the plants at the nursery Which The botanist takes a list of the plants and selects every 5th plant until 90 plants ar The botanist forms groups of 30 plants based on the heights of the plants Then h these groups All of the plants that are in one particular room at the nursery are easily accessible O b A manager at a bus company wants to survey employees about the new uniforms Whic employees O O The manager asks for volunteers and selects every volunteer until 56 employees are employees are easily accessible The manager forms 7 groups of employees based on the departments the employees group The manager forms groups of 8 employees based on the departments the employees a chosen groups c A consultant wants to ask workers at a factory about the workers job satisfaction Which o workers The consultant forms 6 groups of workers based on the workers shifts Then he selects The consultant assigns each worker a different number Using a random number table he consultant selects the workers assigned to the drawn numbers Every set of 54 workers is table

that the proportion of people who are night handed is 10 To test this claim a random sample of 600 people is taken and its determined that 397 people are right handed The following is the Setup for hypothesis test Ho P 0 70 Ha P 0 70 Find the p value for this hypothesis test for a proportion and round your answer to 3 decimal places Round the 2 score to a decimal places The following table can be utilized which provides areas under the Standard Normal Curve 0 018 0 05 0 06 Z 0 00 0 01 0 02 0 03 0 04 2 2 0 014 0 014 0 013 0 013 0 013 0 0120 0 017 0 017 0 017 0 016 0 016 2 0 0 023 0 022 0 022 0 021 0 021 0 0200 020 1 9 0 029 0 028 0 027 0 027 0 026 0 026 0 025 1 8 0 036 0 035 0 034 0 034 0 033 0 032 0 031 1 10 045 0 044 0 043 0 042 0 041 0 040 0 038 0 07 0 08 0 09 0 012 0 011 0 011 0 015 0 015 0 014 0 019 0 019 0 018 0 024 0 024 0 023 0 030 0 030 0 029 0 038 0 038 0 037 0 015 95

A college administrator claims that the proportion of students that are nursing majors is greater than 40 To test this claim a group of 400 students are randomly selected and it s determined that 190 are nursing majors The following is the setup for this hypothesis test Ho p 0 40 Ha p 0 40 In this example the p value was determined to be 0 001 Come to a conclusion and interpret the results for this hypothesis test for a proportion use a significance level of 5 Select the correct answer below The decision is to reject the Null Hypothesis The conclusion is that there is enough evidence to support the claim The decision is to fail to reject the Null Hypothesis The conclusion is that there is not enough evidence to support the claim

people is taken and its determined eople are unemployed he following is the setup for this hypothesis test p 0 05 Haip 0 05 and the pvalue for this hypothesis test for a oportion and round Palotur answer to 3 decimal aces The following short con be utilized which ovides areas under the Standard Normal Curve 0 007 0 01 0 02 9 0 029 0 028 0 03 0 04 0 05 0 06 0 007 0 007 0 024 0 036 0 035 0 034 0 034 0 033 0 045 0 044 0 043 0 042 0 041 0 055 0 054 0 053 0 05 0 051 0 063 0 062 0 061 01 0 074 0 075 0 074 0073 59 J 8 7 5 0 067 0 066 0 064 4 0 081 0 019 0 078 01 0 08 0 09 024 0 024 0 033 03 0 030 0 029 038 0 038 0 031 2047 0 046 0 046 00 57 0 056 10 069 0 018 058 071 0 032 0 831 0 640 0 039 0 050 0 049 Provide answer P value

football game days Suppose that 100 days are randomly selected and the average daily revenue computed Which of the following describes the sampling distribution of the sample mean O A normally distributed with a mean of 1750 and a standard deviation of 250 O B normally distributed with a mean of 1750 and a standard deviation of 25 O C normally distributed with a mean of 175 and a standard deviation of 25 O D skewed to the right with a mean of 1750 and a standard deviation of 250 Question 13 Use the following information to answer the next question You repeatedly draw samples of n 49 from a population with a mean of 80 and a standard deviation of 6 What is the z score for a sample mean of 79 O A 1 16 OB 0 16 O C 1 O D 1 16 OE O Question 14 IQ test scores are normally distributed with a mean of 98 and a standard deviation of 18 An individual s IQ score is found to be 111 Find the z score corresponding to this value O A 0 66 OB 0 68

Determine the Type I error if the null hypothesis Ho is the mean price of a loaf of bread is 1 67 Select the correct answer below You think the mean price of a loaf of bread is 1 67 when in fact it is You think the mean price of a loaf of bread is not 1 67 when in fact it is O You think the mean price of a loaf of bread is not 1 67 when in fact it is not O You think the mean price of a loaf of bread is 1 67 when in fact it is not

A study is conducted to determine if a newly designed text book is more helpful to learning the material than the old edition The mean score on the final exam for a course using the old edition is 75 Ten randomly selected people who used the new text take the final exam Their scores are shown in the table below Person ABCDEFGHIJ Test Score 85 95 70 69 92 96 81 74 76 89 Use a 0 01 significance level to test the claim that people do better with the new edition Assume the standard deviation is 10 5 Also assume the standardized test statistics has N 0 1 as its distribution a What kind of test should be used OA One Tailed B Two Tailed OC It does not matter b The test statistic is 2 32 c The P value is d Is there sufficient evidence to support the claim that people do better than 75 on this exam OA No rounded to 2 decimals B Yes e Construct a 99 confidence interval for the mean score for students using the new text

Suppose the null hypothesis Ho is a sporting goods store claims that at least 70 of its customers do not shop at any other sporting goods stores What is B the probability of a Type Il error in this scenario Select the correct answer below the probability that the sporting goods store thinks that less than 70 of its customers do not shop at any other sporting goods stores when in fact less than 70 of its customers do not shop at any other sporting goods stores the probability that the sporting goods store thinks that at least 70 of its customers do not shop at any other sporting goods stores when in fact at least 70 of its customers do not shop at any other sporting goods stores the probability that the sporting goods store thinks that less than 70 of its customers do not shop at any other sporting goods stores when in fact at least 70 of its customers do not shop at any other sporting goods stores the probability that the sporting goods store thinks that at least 70 of its customers do not shop at any other sporting goods stores when in fact less than 70 of its customers do not shop at any other sporting goods stores

Suppose the null hypothesis Ho is the mean age of the horses on a ranch is 6 years What is the Type I error in this scenario Select the correct answer below You think the mean age of the horses on a ranch is 6 years when in fact it is You think the mean age of the horses on a ranch is 6 years when in fact it is not O You think the mean age of the horses is not 6 years when in fact it is You think the mean age of the horses is not 6 years when in fact it is not

Suppose the null hypothesis Ho is doctors believe that a surgical procedure is successful at least 80 of the time What is the Type I error in this scenario Select the correct answer below Doctors think the surgical procedure is successful less than 80 of the time when in fact it really is successful less than 80 of the time Doctors think the surgical procedure is successful less than 80 of the time when in fact it is successful at least O 80 of the time O Doctors think the surgical procedure is successful at least 80 of the time when in fact it is not O Doctors think the surgical procedure is successful at least 80 of the time when in fact it is

Daniel a long jumper claims that his jump distance is less than 15 feet on average Several of his teammates do not believe him so he decides to do a hypothesis test at a 10 significance level to persuade them He makes 11 jumps The mean distance of the sample jumps is 14 2 feet Daniel knows from experience that the standard deviation for his jump distance is 1 7 feet Ho 15 Ha 15 a 0 1 significance level What is the test statistic z score of this one mean hypothesis test rounded to two decimal places Provide your answer below

Floretta a pitcher claims that her pitch speed is less than 46 miles per hour on average Several of her teammates do not believe her so she decides to do a hypothesis test at a 5 significance level to persuade them She throws 24 pitches The mean speed of the sample pitches is 37 miles per hour Floretta knows from experience that the standard deviation for her pitch speed is 5 miles per hour Ho 46 H 46 0 05 significance level What is the test statistic z score of this one mean hypothesis test rounded to two decimal places Provide your answer below

2 Gains from trade Suppose there exist two imaginary countries Sequoia and Yosemite Their labor forces are each capable of supplying four million hours per week that can be used to produce pistachios chinos or some combination of the two The following table shows the amount of pistachios or chinos that can be produced by one hour of labor

Suppose the null hypothesis Ho is Darrell has enough money in his bank account to purchase a new television What is the Type I error in this scenario Select the correct answer below O Darrell thinks he does not have enough money in his bank account to purchase the television when in fact he does Darrell thinks he does not have enough money in his bank account to purchase the television when in fact he does not O Darrell thinks he has enough money in his bank account to purchase the television when in fact he does not Darrell thinks he has enough money in his bank account to purchase the television when in fact he does FACE HEME FEEDRACK MORE INSTRUCTION SUBMI 11

A consumer protection company is testing a seat belt to see how much force it can hold The null hypothesis Ho is that the seat belt can hold at least 5000 pounds of force The alternative hypothesis Ha is that the seat belt can hold less than 5000 pounds of force What is a Type Il error in this scenario Select the correct answer below O The researchers conclude that the seat belt holds at least 5000 pounds of force but the seat belt actually holds less than 5000 pounds O The researchers conclude that the seat belt holds less than 5000 pounds of force but the seat belt actually holds more than 5000 pounds The researchers conclude that the seat belt holds less than 5000 pounds of force and the seat belt actually holds less than 5000 pounds F 11 11 FOOD 1 1 1 11 1

Determine the Type I error if the null hypothesis Ho is researchers claim that 65 of college students will graduate with debt Select the correct answer below O The researchers think that greater than or less than 65 of college students will graduate with debt when in fact 65 will graduate with debt O The researchers think that 65 of college students will graduate with debt when in fact more or less than 65 of college students will graduate with debt O The researchers think that 65 of college students will graduate with debt when in fact 65 of college students really will graduate with debt O The researchers think that greater than or less than 65 of college students will graduate with debt when in fact greater than or less than 65 of college students will graduate with debt

3 If a coin is tossed twice which of the following gives the probability that it will land both times heads up on both times tails up 1 0 75 2 0 67 3 0 25 4 0 50

2 If a month is picked at random which of the following represent the probability its name will begin with the letter J 1 0 08 2 0 25 3 0 12 4 0 33

Which of the following could not be the value of a probability Explain your choice 3 2 4 1 53

edit ONLY 10 pts A Opinion regarding climate change OB Opinion regarding pollution of waterways C Opinion regarding nuclear war D Gender E Stato OF Education Question 4 of 5 G Opinion regarding air pollution H Party affiliation For the following description of data identify the W s from what s given name the variables specify for each variable whether its use indicates that it should be treated as categorical or quantit for any quantitative variable identify the units in which it was measured or note that they were not provided DI Race A polling organization conducted a poll of registered American voters in 2017 to gauge people s levels of concern about a variety of issues including environmental issues The data collected fo voter included his or her gender age race education and party affiliation and whether he or she was worried a great deal about climate change about air pollution and about pollution of wa J Age OK The What for this situation cannot be determined from the given information Identify the When This quiz 5 point s possible This question 1 point s possible A 2017 OB 2016 OC 2016 2017 OD The When for this situation cannot be determined from the given information Identify the Where Resume later Submit quiz

Which graph corresponds to the following hypothesis test Ho p 8 1 Ha p 8 1 8 1 8 1

A city wants to show that the mean number of public transportation users per day is more than 5 575 Identify the null hypothesis Ho and the alternative hypothesis Ha in terms of the parameter u Select the correct answer below O Ho 5 575 Ha 5 575 O Ho 5 575 Ha 25 575 5 575 Ha 5 575 O Ho O Ho 5 575 Ha 5 575

Which of the following results in a null hypothesis p 0 69 and alternative hypothesis p 0 69 Select the correct answer below O A mechanic wants to show that the percentage of car owners that follow a normal maintenance schedule is not 69 contrary to a study that found that the percentage was 69 A mechanic wants to show that more than 69 of car owners follow a normal maintenance schedule contrary to a study that found that the percentage was at most 69 A mechanic wants to show that at most 69 of car owners follow a normal maintenance schedule contrary to a O study that found that the percentage was more than 69 A mechanic wants to show that less than 69 of car owners follow a normal maintenance schedule contrary to a study that found that the percentage was at least 69

Suppose a long jumper claims that his jump distance is not equal to 16 feet on average Several of his teammates do not believe him so the long jumper decides to do a hypothesis test at a 10 significance level to persuade them He makes jumps The mean distance of the sample jumps is 15 4 feet The long jumper knows from experience that the standard deviation for his jump distance is 1 8 feet Ho 16 Ha 16 a 0 1 significance level What is the test statistic z score of this one mean hypothesis test rounded to two decimal places Provide your answer below

Identify the type of hypothesis test below Ho X 16 9 Ha X 16 9 Select the correct answer below O The hypothesis test is two tailed The hypothesis test is left tailed O The hypothesis test is right tailed

ne left 0 10 1 The table below shows the relationship between the age and price for used cars sold in the last year by a local car dealership Round numbers to two decimal places a Find the best fit line using linear regression on your calculator b Use your equation to estimate the price of a 9 year old car Show algebraic steps Age of Car 3 3 5 6 7 8 10 sy Price 5800 5700 4500 4200 4100 2500 2 The table below shows the price in dollars of a gallon of gas in June Use 2015 as year 0 a Sketch a graph by hand and draw a trend line When choosing the units on the y axis consider the prices b Write the equation of a trend line Show algebraic steps c Use your equation to estimate the price of per gallon in 2023 Show algebraic steps Year 2015 2016 2017 2018 2019 2020 2021 2022 Price 2 0822 366 2 3472 891 2 7162 0823 0644 929 3 Is the equation of a trend line on a graph always the same as the line of best fit Why or

Which graph below corresponds to th following hypotheses test HoiN 16 9 HaiN 16 9 Select correct answer e 16 9 16 9

Suppose the null hypothesis Ho is a weightlifting bar can withstand weights of 800 pounds and less What is a the probability of a Type I error in this scenario Select the correct answer below the probability that you think the weightlifting bar can withstand weights of 800 pounds and less when in fact it O cannot the probability that you think the weightlifting bar can withstand weights of 800 pounds and less when in fact it O can the probability that you think the weightlifting bar cannot withstand weights of 800 pounds and less when in fact it can O the probability that you think the weightlifting bar cannot withstand weights of 800 pounds and less when in fact it cannot

Suppose a chef claims that her meatball weight is not equal to 4 ounces on average Several of her customers do not believe her so the chef decides to do a hypothesis test at a 10 significance level to persuade them She cooks 13 meatballs The mean weight of the sample meatballs is 3 9 ounces The chef knows from experience that the standard deviation for her meatball weight is 0 6 ounces Ho 4 Ha 174 0 1 significance level What is the test statistic z score of this one mean hypothesis test rounded to two decimal places Provide your answer below Toot

hich of the following results in a null hypothesis p 0 44 and alternative hypothesis p 0 44 elect the correct answer below An online article is trying to show that less than 44 of internet users participate in social media contrary to ar established figure saying that at least 44 of internet users participate in social media An online article is trying to show that 44 of internet users participate in social media contrary to an establish figure saying that more than 44 of internet users participate in social media An online article is trying to show that more than 44 of internet users participate in social media contrary to a established figure saying that at most 44 of internet users participate in social media An online article is trying to show that at least 44 of internet users participate in social media contrary to an established figure saying that less than 44 of internet users participate in social media

elp your work or conclusions in some way Describe what variable would be tested ar what would be your guess of the value of that variable Then include how the result if the null were rejected or not might change your conclusions or actions in some way Follow Up Post Instructions Respond to at least one peer Further the dialogue by providing more information and clarification Writing Requirements

Which of the following results in a null hypothesis 7 and alternative hypothesis 7 Select the correct answer below O A study wants to show that the mean number of hours of sleep the average person gets each day is at least 7 O A study wants to show that the mean number of hours of sleep the average person gets each day is 7 OA study wants to show that the mean number of hours of sleep the average person gets each day is more tha O A study wants to show that the mean number of hours of sleep the average person gets each day is at most 7