Statistics Questions and Answers

In a packet of stickers there are 14 small stars 2 big stars small rockets and 7 big rockets Chang is going to choose one of these stickers from the packet at random to put on his artwork What is the probability that the sticker Chang chooses is big or is a rocket Do not round intermediate computations and round your answer to the nearest hundredth If necessary consult a list of formulas

Espanol In a big cooler in the kitchen there are the following drinks 8 bottles of soda 7 cans of soda and 4 cans of juice But there are no bottles of juice Keisha just came in from playing outside and is going to choose one of these drinks at random from the cooler What is the probability that the drink Keisha chooses is in a bottle or is a juice Do not round intermediate computations and round your answer to the nearest hundredth If necessary consult a list of formulas

A spinner has 10 equally sized sections 1 of which is green and 9 of which are red The spinner is spun and at the same time a fair coin is tossed What is the probability that the spinner lands on green and the coin toss is heads Do not round your answer If necessary consult a list of formulas

eek 7 Hmwk e 2 18 2 18 answered Question 16

For a standard normal distribution given P Z 0 9815 Find the z score associated with the resulting probability Round your z score accurate to 2 dec places

The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs The distribution of the number of daily requests is bell shaped and has a mean of 38 and a standard deviation of 4 Using the empirical rule what is the approximate percentage of lightbulb replacement requests numbering between 38 and 42 Use 68 95 99 7 and do not enter the percent symbol ans 6

In a mid size company the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell shaped and has a mean of 54 and a standard deviation of 10 Using the empirical rule what is the approximate percentage of daily phone calls numbering between 24 and 84 Use 68 95 99 7 and do not enter the percent symbol ans

About 9 of the population has a particular genetic mutation 600 people are randomly selected Find the mean for the number of people with the genetic mutation in such groups of 600

9 Develop an amortization schedule for 50 000 for 3 years at 10 compounded semiannually First compute the regular payment Period 0 1 2 3 st 4 5 Amount of Payment Interest for period Portion to Principal Principal at End of Period 50 000 00

Assume that 29 of people have sleepwalked Assume that in a rand a Assuming that the rate of 29 is correct find the probability that 45 b Is that result of 457 or more significantly high c What does the result suggest about the rate of 29 a Assuming that the rate of 29 is correct the probability that 457 or Round to four decimal places as needed b Is that result of 457 or more significantly high because the probability of this event is c What does the result suggest about the rate of 29 OA Since the result of 457 adults that have sleepwalked is not sign than the proba

A high school baseball player has a 0 232 batting average In one game he gets 8 at bats What is the probability he will get at least 4 hits in the game

Among 350 randomly selected drivers in the 16 18 ag

An FDA guideline is that the mercury in fish should be below 1 part per million ppm Seven different stores in New York City were sampled and the mean amounts of mercury ppm found in tuna sushi was 0 719 ppm and the standard deviation was 0 366 ppm Construct a 98 confidence interval estimate of the mean amount of mercury in the population Does it appear that there is too much mercury in tuna fish Please show your work by stating the formulas used to construct your confidence interval estimate Please indicate the values plugged into the formula Then round your answer to three decimal places Please include units and a complete summary sentence as well as answer the follow up question

E Quiz MATH 0314 Chapter 3 Mastery Quiz

Suppose that we ve decided to test Clara who works at thoroughly shuffle a standard deck of 52 cards which is Clara to name the suit heart spade diamond or club deck draw another card and get her guess for the suit guesses for each Assume that Clar

binding capacity that human serum albumin HSA 67000 Da a transfer protein found in human blood has for a novel molecular probe EO550 MW 691 85 g mol When bound to HSA EO550 absorbs light strongly at 550 nm When unbound both HSA and EO550 have negligible absorbance at 550 nm added L 3 70 8 60 9 50 10 40 11 20 12 40 13 30 15 40 corrected absorbance 10 40 L ea absorbance 0 111 0 210 0 232 0 251 0 254 0 257 0 256 0 255 The researcher prepared eight individual samples each containing 0 74 mg HSA dissolved in 150 L of a pH 7 4 phosphate buffered saline solution To each of the eight samples a different volume of 1900 0 M EO550 was added and the absorbance was measured at 550 nm The observed absorbance measured at 550 nm for each added volume of the EO550 solution is shown in the table As more EO550 is added to the HSA solution the absorbance increases as more EO550 binds to available sites on the HSA protein When the binding sites are fully occupied the absorbance will no longer increase level off as more EO550 is added What is the corrected absorbance when 10 40 L of the EO550 solution is added to the 150 0 L HSA solution Construct a graph of the corrected absorbance y axis versus the volume of titrant added x axis What is the estimated endpoint of the titration Calculate the mass of EO550 added to reach the endpoint

KE Assume that the sample is a simple random sample obtained needed to be 95

Let X be a random variable with the following proba Value x of X P X x 20 30 40 50 0 10 0 35 0 20 0 35 Complete the following If necessary consult a list

didate has asked you to co e only wants a 4 margin decimal number more O Post to forum tion

Trydint bubble gum company claims that 7 out of 10 people prefer their gum to Eklypse Test their claim that it is different at the 99 confidence level The null and alternative hypothesis in symbols would be Ho p 0 7 H 0 7 O Ho p 0 7 H p 0 7 Ho p 0 7 H p 0 7 O Ho p 0 7 H 0 7 O Ho p 0 7 H 0 7 Ho p 0 7 H p 0 7 The null hypothesis in words would be O The average of people that prefer Trydint gum is 0 7 The proportion of people in a sample that prefers Trydint gum is 0 7 O The average of people that prefer Trydint gum is not 0 7 The proportion of all people that prefer Trydint gum is 0 7 O The proportion of all people that prefer Trydint gum is greater than 0 7 The proportion of all people that prefer Trydint gum is less than 0 7 O The proportion of people in a sample that prefer Trydint gum is not 0 7 Based on a sample of 230 people 139 said they prefer Trydint gum to Eklypse The point estimate is to 4 decimal places The 99 confidence int

Score 8 49 12 7 12 answered Question 8 Score on last try 0 27 of 1 pts See Details for more Next question You can retry this question below You are concerned that nausea may be a side effect of Tamiflu but you cannot just gi with the flu and say that nausea is a side effect if people become nauseous This is be common for people who have the flu From past studies you know that about 32 of p experience nausea You collected data on 2232 patients who were taking Tamiflu to re flu and found that 782 experienced nausea Use a 0 01 significance level to test the percentage of people who take Tamiflu for the relief of flu symtoms and experience n 32 a Identify the null and alternative hypotheses Ho H b What type of hypothesis test should you conduct left right or two tailed O left tailed O right tailed

8 49 12 7712 answered uestion 6 ore on last try 0 75 of 1 pts See Details for more Next question You can retry this question below the claim that the proportion of people who own cats is smaller than 40 at the est is ull and alternative hypothesis would be 0 4 Ho p 0 4 Ho p 0 4 Ho p 0 4 Ho p 0 4 Ho p p 0 4 H 0 4 H p0 4 H p 0 4 H 0 4 H p RO p O O ailed right tailed two tailed on a sample of 700 people 32 owned cats

4 In 1980 the minimum wage was 3 10 in the US Use the CPI table to estimate the minimum wage in 1987 1989 1990 1991 1992 1993 124 0 130 7 136 2 140 3 144 5 5 The population of West City was decimated after the arrival of the Rose Haired Demi God It was said that the population was reduced by 93 leaving only 500 000 people left What was the original population of West City before the assault 6 After many years of consideration you make a life changing decision to get liposuction After the procedure your total body weight has decreased by 20 After several months without making any dietary changes your weight increases by 20 Is your weight higher lower or the same as your starting weight pre surgery Explain your answer mathematically 7 The average American produces about 4 5 pounds of trash each day How many tons of trash is produced by the average American in a year 1 ton 2000 lbs

Assume that the random variable X is normally distributed with mean 40 and standard deviation a 12 Compute the probability P 7 X 55 Round to four decimal places OA 0 8914 B 0 8819 C 0 8944 D 0 7888

alize com assignments viewer classes c2225e3e28334a02 High Sch C Infinite Campus Outlook MAIN MARKE 12 Prob Stats Exam Part 2 AA2 LMS graded canvas ator to find the equation of the line of best fit for the data in the ta 1999 2000 2001 2002 2003 2004 2005 2006 2007 1299 1321 1323 1353 1388 1397 1417 1439 1453

The amount of soda a dispensing machine pours into a 12 ounce can of soda follows a normal distribution with a standard deviation of 0 12 ounce Every can that has more than 12 30 ounces of soda poured into it causes a spill and the can needs to go through a special cleaning process before it can be sold What is the mean amount of soda the machine should dispense if the company wants to limit the percentage that need to be cleaned because of spillage to 3 Round to three decimal places A 12 560 oz B 12 074 oz C 12 040 oz D 12 526 oz

Find the value of Z0 16 Round to two decimal places OA 1 04 OB 0 99 OC 0 56 OD 0 99

The amount of corn chips dispensed into a 16 ounce bag by a dispensing machine has been identified as possessing a normal distribution with a mean of 16 5 ounces and a standard deviation of 0 2 ounce What chip amount represents the 67th percentile for the bag weight distribution Round to two decimal places OA 16 13 oz OB 16 59 oz OC 16 09 oz OD 16 63 oz

Suppose a brewery has a filling machine that fills 12 ounce bottles of beer It is known that the amount of beer poured by this filling machine follows a normal distribution with a mean of 12 47 ounces and a standard deviation of 0 04 ounce Find the probability that the bottle contains between 12 37 and 12 43 ounces Round to four decimal places A 0 1524 OB 0 8351 OC 0 1649 OD 0 8476

Some are grey and some are white The slices numbered 1 7 and 9 are grey The slices numbered 2 3 4 5 6 8 and 10 are white A dart is tossed and lands on a slice at random Let X be the event that the dart lands on a grey slice and let P X be the probability of X Let not X be the event that the dart lands on a slice that is not grey and let P not X be the probability of not X Event X not X b Subtract Outcomes from OOOOOOO 1 P x OOOOOO 1 2 3 4 5 6 7 8 9 10 a For each event in the table check the outcome s that are contained in the event Then in the last column e the probability of the event U 0 O 1 to 10 00 00 X c Select the answer that makes the sentence true Probability P X OP not X G 010 9 8 X 7 10 1 65 2 S 3 4

TB ES Qu 12 126 Consider a two w Consider a two way analysis of variance ex Source of Variation df SS

ezto mheducation com ext map index html con con external browser 08 ANOVA and Chi square Computation i 4 10 points eBook Exercise 13 7 Algo METHODS AND APPLICATIO Last rating period the percentages of viewers watching severa follows WDUX WWTY WTJW News News Cheers Reruns News 15 21 17 WACO 25 Others 228 Suppose that in the current rating period a survey of 2 000 vie

The times it took to complete a frame of snooker were recorded at a tournament Here are the results times t mins freq f 0 t 10 11 10 t 20 30 20 t 30 45 30 t 60 14 O mid points m 0000 the mean time fm 6 mins

Two months after the first flowers appear on a runner bean plant the lengths of the beans are all measured length 1 cm freq f 0 5 6 5 10 14 10 15 22 15 25 8 mid points m 6 fm

A group of people answer the question How many times did you shop at Ascobury s last week Here are the results visits v frequency f 0 1 2 3 4 Find the m 22 4 13 18 8 7 number of visits fv 5

A cashier answers the question How many of each of these notes do you have in the till Here are the results note value v 5 10 20 50 frequency fv f 27 25 36 12 Find the mean note value 0000 5

The data below was collected from manufacturer advertisements of their vehicles horsepower and highway gas mileage mpg Use this data to answer the following questions X y 190 220 158 250 340 350 390 15 17 11 35 42 33 28 1 Find the the correlation coefficient Round your final answer to four decimal places T 2 Write the regression equation below Round all numbers to four decimal places y 3 Using the data shown above predict the the highway gas mileage mpg for a car that has a horsepower of 225 Round your final answer to two decimal places 4 What percentage of variation in highway gas mileage mpg can be explained by horsepower Round your final answer to two decimal places

The average resting heart rate of a population is 86 beats per minute with a standard deviation of 10 5 bpm Find the z scores that correspond to each of the following heart rates Round your answers to the nearest hundredth if necessary a 112 bpm Z b 67 bpm Z

Question 2 0 6 pts 100 Pizza Co has recently received complaints about the inconsistent amount of cheese on their pizza Michelle the manager finds that the amount of cheese on a slice of pizza is uniformly distributed 6 ounces a Find the probability that there is less than 2 5 ounces of cheese on a slice of pizza Round to 3 places b Find the probability that there is at least 4 ounces of cheese on a slice of pizza Round to 3 dec places c Find the probability that there is between 2 75 to 3 25 ounces of cheese on a slice of pizza Ro decimal places d Find the 70th percentile for the amount of cheese on a slice of pizza This is the amount of ch is more than 70 of the of all slices e Find the average amount of cheese on a slice of pizza Round to 3 decimal places f Find the standard deviation for the amount of cheese on a slice of pizza Round to 3 decimal pl

The following table shows results from a Polsson GLM generalized linear regression model testing the vocal behaviour of barn owl siblings number of calls while at the nest in response to three predictor variables Food treatment Parent sex and arrival time and interaction terms between some of these factors Link the correct statements below based on this information Intercept FoodTreatmentSatiated Arrival Time SexParentMale FoodTreatmentSatiated SexParentMale FoodTreatmentSatiated ArrivalTime Estimate Std Error 0 292 0 011 0 018 0 021 0 070 5 169 0 654 0 221 0 121 0 129 0 001 0 019 p value 0 004 0 001 0 039 0 001 0 065 0 978 When parents arrived earlier back to the nest Food treatment is a categorical variable with two options satiated and not satiated the models predicts satiated owls to make how many calls Tested interactions explore When the female parent arrived to the nest A owl sibblings made a similar number of calls B if the effect of food treatment on the number of calls varies depending on the sex of the parent and on the time of arrival C 5 823 calls D 5 169 calls E owl sibblings made significantly fewer calls F if the effect of parent sex on the number of calls varies when depending on the time of arrival G 0 654 calls owl gibblings made plan iesail

Moussa is investigating how long his phone s battery lasts in hours for various brightness levels on a scale of 0 100 His data is displayed in the table and graph below Brightness Level x Hours y 9 8 7 6 5 4 Hours 3 2 1 10 20 30 17 6 18 28 5 2 18 6 3 5 8 42 5 4 42 45 62 3 7 5 5 3 8 40 50 60 70 80 90 100 11 Brightness Level a What is the residual for the point 45 5 5 Round to 4 decimal places

Model Toxin ng Tail mm Residuals Min 1Q Median 3Q Max 61 958 8 286 3 026 16 246 38 771 Coefficients Intercept Tail mm QUESTION 18 Estimate 25 06 0 96 Signif codes 0 0 001 0 01 Std Error 8 675 0 049 0 05 0 11 t value 2 888 19 469 The 95 confidence interval for the regression model in Question 15 is as follows 2 5 0 86 97 5 1 06 Tail mm What is the range of expected toxin values in ng for a lizard with a tail length of 200 mm

6 and 7 Quiz for ss K Que Construct a 90 confidence from two foot fe

ule 6 and 7 Quiz for class K Claim Question 15 c Test the claim about the difference betwe samples are random and independent a H H x 0 10 Assume o o

6 and 7 Quiz for iss K Question 11 of 16 The dean of a university estimates that the me member of the student council you want to tes eight full time faculty for one week is shown in parts a through d below Assume the popula 12 8 7 1 12 5

and 7 Quiz for K Question 2 of 16 A humane society claims that less than 74 of ho households in that country 420 say they own a pe claim Complete parts a through c below

and 7 Quiz for 5 K Question 7 of 16 Identify the type I error and the type II error for The percentage of households with Internet a

Module 6 and 7 Quiz for reek class

The mean daily production of a herd of cows is assumed to be normally distributed with a mean of 35 liters and standard deviation of 2 6 liters A What is the probability that daily production is less than 28 8 liters Round your answer to 4 decimal places Answer B What is the probability that daily production is more than 36 9 liters Answer Round your answer to 4 decimal places as necessary

free heights Cherry trees in a certain orchard have heights that are normally distributed with mean 109 inches and standard deviation o 13 inches Use ne TI 84 PLUS calculator to answer the following Round the answers to at least two decimals a Find the 24th percentile of the tree heights b Find the 80th percentile of the tree heights c Find the second quartile of the tree heights d An agricultural scientist wants to study the tallest 1 of the trees to determine whether they have a certain gene that allows them to grow taller To do this study all the troon height What height in this