Questions

A humane society claims that less than 68 of households in a certain country own a pet In a random sample of 600 households in that country 396 say they own a pet At a 0 01 is there enough evidence to support the society s claim Complete parts a through c below a Identify the claim and state Ho and Ha Identify the claim in this scenario Select the correct choice below and fill in the answer box to complete your choice Type an integer or a decimal Do not round O A Less than of households in the country own a pet OB The percentage households in the country that own a pet is not OC of households in the country own a pet O D D More than of households in the country own a pet

display results from a test of the claim that hall of us say that we should replace passwords with biometric security Use the normal distribution as an approximation to the binomial distribution Use the display and a 0 10 significance level to complete pers a through e a is the best two tailed bolt tailed or right bailed Choose the correct answer below leit tailed two tailed right tailed b What is the test statistic 21 27 Round to two decimal places as needed c What is the P value P value 0 205 Round to three decimal places as needed d What is the null hypothesis and what do you conclude about it The null hypothesis is Ho P 05 where p denotes the population proportion of people who say that we should replace passwords with biomeline security Fail to act the not hypothes Type an integer or a decimal Do not round

Although the ELISA test is a powerful technique some of its disadvantages are the relatively long time to obtain a result and its inability to test for an active immune response against an infection True False

grams a How many different anagrams including nonsensical words can be made from SUCCESS b How many can be made if we require that the first and last letters must both be S c How many distinct arrangements of the word SUCCESS are there with the condition that con sonants always should come together as one block Examples SSSCCUE SSSCCEU CSSSCEU etc

Which of the following is the hypothesis test to be conducted A Hop 05 H p 05 Ho p 05 H p 05 OEM p 05 Hy D 05 What is the test statistic 20 Round to two decimal places as needed OB Ho P 05 H p 05 OD Ho p 05 H p 0 5 OF 16 0205 H p 05

Four jars of coins each contain 144 coins The theoretical probability of randomly drawing a quarter is given in simplified form Find the number of quarters in each a 153 quarters per jar b c 91 6 49 quarters per jar 38 2 d 3 quarters per jar quarters per jar

What does real time mean in rRT PCR A relatively small amount of PCR product can be quantified All of these choices It can be used to screen for results in Real Time We can monitor the progress of a PCR while its running

According to affect control theory people act differently from one situation to the next because they have different identities Give 2 specific and detailed examples for when this has occurred with you e g how you act at work vs how you act with friends describe a few at least 3 behaviors of you at work and 3 behaviors you display with friends Each example described is worth 2 points Maximum 4 points Provide details of you when you take on each of these two identities

In a study of cell phone usage and brain hemispheric dominance an Internet sur was e mailed to 6968 subjects randomly selected from an online group involved ears There were 1333 surveys returned Use a 0 01 significance level to test the claim that the return rate is less than 20 Use the P value method and use the normal distribution as an approximation to the binomial distribution Identify the null hypothesis and alternative hypothesis A Ho p 0 2 H p 0 2 C Ho p 0 2 H p 0 2 E Ho p 0 2 H p 0 2 The test statistic is z Round to two decimal places as needed B Ho p 0 2 H p 0 2 D Ho p 0 2 H p 0 2 OF Ho p 0 2 H p 0 2

You and your friend want to take graduation pictures with a few of your fellow computer science class mates making 10 of you in total You hired a very expensive photographer for the occasion and want to make the most of the experience You want to select four students to stand in the front of the group in a line In how many ways is it possible to take the pictures such that a you have a place at the front of the group photo b you and your friend have a place together at the front of the group photo

Describe the genetic material of SARS CoV 2 O ds DNA ve sense ssRNA ve sense ssRNA 5 DNA Question 4 1 point Listen Why do we use no template control in the reaction To screen for CDNA To test for viral RNA To screen for any contamination in the reagents

What is an amplicon O Target ds DNA none of these ss DNA Target ss viral RNA

K In a newspaper s survey of 453 people 53 said that we should replace passwords with biometric security such as fingerprints The accompanying Statdisk display resulls from a lest of the say that we should replace passwords with biometric security Use the normal distribution as an approximation to the binomial distribution Use the display and a 0 10 significance level to complete parts a through a a Is the test two tailed left tailed or right tailed Choose the correct answer below Oleft tailed two tailed right tailed b What is the test statistic z 1 27 Round to two decimal places as needed c What is the P value P value 0 205 Round to three decimal places as needed d What is the null hypothesis and what do you conclude about it umothoci 0 5 where n denotes the population proportion of people who say that we should replace passwords with biometric security Fail to reject the null hypothesis

5 Binomial Theorem Using the Binomial Theorem what is the coefficient of a x 13 in x 2 30 b y13 in 2 y 30

What are the assay controls in this experiment Positive control negative control and no template control Internal control negative control No controls were used Positive control no template control Question 2 1 point Listen Which of the following is not a component of rRT PCR DNA probe virus particle Primers Reverse transcriptase

If Rita receives 41 14 interest for a deposit earning 5 simple interest for 140 days what is the amount of her deposit Round your answer to the nearest cent X Suggested tutorial Learn It Calculate the Interest Rate the Present Value or the Time for an Investment Using the Simple Interest Formula Nood

Which of the following is not a component of rRT PCR DNA probe virus particle Primers Reverse transcriptase Reaction Buffer

Why do we use no template control in the reaction To screen for cDNA To test for viral RNA To screen for any contamination in the reagents To screen for other nucleic acid in the reaction

Fluorescent signals from the reporter dye are number of amplicons that are generated Inversely proportional Indirectly proportional Cross wise proportional Directly proportional proportional to the

What is meant by the pandemic spread of SARS CoV 2 It spread through the ocean It spreads world wide It spreads only in a certain area It spreads only in one country

evenue Mo s HookNLadder is the only company selling fire engines in the fictional country of Alexandrina Mo initially produced eight trucks but then decided to increase production to nine trucks The following graph gives the demand curve faced by Mo s HookNLadder As the graph shows in order to sell the additional fire truck Mo must lower the price from 80 000 to 60 000 per truck Notice that Mo gains revenue from the sale of the additional engine but at the same time he loses revenue from the initial eight engines because they are all sold at the lower price Use the purple rectangle diamond symbols to shade the area representing the revenue lost from the initial eight engines by selling at 60 000 rather than 80 000 Then use the green rectangle triangle symbols to shade the area representing the revenue gained from selling an additional engine at 60 000 110 100 90 22 80 70 PRICE Thousands of dollars per fire engine 60 50 40 30 20 10 O Revenue Lost Demand 2 3 4 5 6 7 8 9 10 QUANTITY Fire engines Revenue Gained Mo increase production from 8 to 9 fire engines because the dominates in this scenario True or False If alternatively Mo s HookNLadder were a competitive firm and 80 000 were the market price for an engine decreasing its price from 80 000 to 60 000 would result in the same change in the production quantity and thus total revenue O True

Your field experience instructor wants to line up 9 cars for transportation to a grade school Between you and your classmates there are 25 cars available How many different groups of cars are possible different groups

Find the number of permutations of each group of letters a G E C K O permutations b P Y T H A G O R U S permutations

ASK YOUR TEA The dial of a combination lock has the numbers 0 through 38 The combination to open the lock is actually an ordered sequence of 3 numbers Each ordered sequence from your textbook is called an outcome How many outcomes are possible for this lock outcomes

The manager of a baseball team must determine the batting order of the nine starting players a Is the possible number of outcomes found using permutations or combinations Explain your reasoning since the order Select matter The possible number of outcomes is found by using a Select b How many different batting orders are possible orders

You throw four softballs at the strike zone target shown The softballs are equally likely to hit any point of the strike zone target What is the probability that the first softball hits zone 1 second softball hits zone 3 the third softball hits zone 2 and the fourth softball hits zone 4 Enter your probability as a fraction T 6 in 1 2 12 in 3 4

Determine the number of possible outcomes for each experiment a Flipping a coin outcomes b Rolling a standard die outcomes c Choosing a letter from the alphabet outcomes

Scholarship A is worth 1000 and costs 10 to apply Scholarship B is worth 4000 and costs 25 to apply You have a 4 chance of receiving Scholarship A and the Scholarship B a What is your expected value for Scholarship A b What is your expected value for Scholarship B c You can only apply for one scholarship Which one should you choose O Scholarship A O Scholarship B

ASK YOUR You are given a bag with 8 green marbles 6 blue marbles 12 yellow marbles and 10 red marbles Find the theoretical probability of each random event Enter your probabilitie fractions a Drawing a green marble b Drawing a red marble c Drawing a marble that is not yellow

Serology testing is used to detect previous infection antibodies to SARS CoV 2 in people who may have been exposed to the virus True False Question 6 1 point Listen The purpose of doing Microneutralization assay is to confirm the positive result that is obtained by ELISA True

You cannot remember your 5 digit bike lock combination What is the probability that you guess the combination correctly Enter your probability as a fraction

The cells resulting from the microneutralization assay should be counted with a Spectrophotometer Hemocytometer Crystal violet stain

Which serum sample contains antibodies that block infection Sample A Sample B A Neither OB Both

There is a line through the origin that divides the region bounded by the parabola y 2x 4x2 and the x axis into two regions with equal area What is the slope of that line

A volume is described as follows 1 the base is the region bounded by x y 16y 50 and z y 20y 110 2 every cross section perpendicular to the y axis is a semi circle Find the volume of this object volume

b A paint company has developed a new paint formula which should have a faster drying time compared to the old formula Paint drying time is known to be normally distributed and from previous tests it is known that the original paint formula has a mean drying time of 45 min The company s R D scientists believe the new formula will have a mean drying time of 235 min that is they expect the new formula to dry an average of 10 min faster than the old formula or that 10 They aren t sure what the population variances are yet but the new formula is not expected to affect the variance in drying time A scientist takes 10 samples of each paint formula and determines the mean drying time for each batch to be X 45 min and X2 34 min with sample variances equal to s 6 5 min and s 4 4 min respectively Find a 95 confidence interval on the difference in average lifetime between the two populations

Approximate to the nearest 10 the solutions of the equation in the interval 0 360 If there is no solution enter NO SOLUTION sin2 t 8 sin t 5 0 t Need Help smaller value larger value

Use the properties of logarithms to condense the following logs as much as possib 3 log m logn log b 4 3log a log b

5 4 3 3 3 22 1 2 1 2 3 4 2 3 14 5 6 Identify the function whose graph appears above f x

3 Explain what is happening in this image Which type of immune response will this lead to humoral immunity or cell mediated immunity

2 Consider the function f x y y x 16 i Determine an equation for the tangent plane to the surface z f x y at input 3 2 ii Use part i to estimate the number 1 98 3 3 01 2 16 by hand For fun ask a machine what this number comes out to and compare to your estimate are you close

K Use the results from a survey of a simple random sample of 1038 adults Among the 1038 respondents 88 rated themselves as above average drivers We want to test the claim that more than themselves as above average drivers Complete parts a through e 17 of adults ra 20 a Regardless of the conclusion reached from the hypothesis test is it possible that more than of adults can be above average drivers 20 A Yes Assuming quality of driving can be quantified a distribution that is extremely skewed to the left would be the most promising scenario for more than this proportion of adults to have driving quality that is above the mean B No Assuming quality of driving can be quantified half of all adults must have driving quality less than or equal to the mean OC Yes Assuming quality of driving can be quantified a distribution that is extremely skewed to the right would be the most promising scenario for more than this proportion of adults to have driving quality that is above the mean COD No It is impossible to compare the quality of different adults driving b If we use the same significance level to conduct the hypothesis test using the P value method the critical value method and a confidence interval which method is not always equivalent to the other two A The P value method is not always equivalent to the other two B The confidence interval method is not always equivalent to the other two CC The critical value method is not always equivalent to the other two OD All three methods are always equivalent to each other c It was stated that we can easily remember how to interpret P values with this If the P is low the null must go What does this mean This statement means that if the is low in relation to then one should

engineer takes a sample of 10 batteries and calculates a sample variance of 1 3 hr2 Find a 99 confidence interval on the population variance o 0 b A school district wants to evaluate the effectiveness of a new teaching method for improving students math scores A sample of 25 students is randomly selected and their math scores are measured before and after the new teaching method is implemented The sample standard deviation of the differences in math scores is 5 2 points Find a 90 confidence interval on the population variance o

0 38 If the measure of angle A is 75 and the measure of angle C is 25 in a triangle ABC what is the measure of angle B

In a study of 809 randomly selected medical malpractice lawsuits them were dropped or dismissed Use a 0 01 significance level to test the claim that mos medical malpractice lawsuits are dropped or dismissed Which of the following is the hypothesis test to be conducted OA Ho p 0 5 H p 0 5 c Ho p 0 5 H p 0 5 E Ho p 0 5 H p 0 5 What is the test statistic Z B Ho p 0 5 H p 0 5 OD Ho p 0 5 H p 0 5 OF Ho p 0 5 p H p 0 5

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified line about the line x 6 209 Volume TC 3 y x x y

Select the representations that do not change the location of the point 2 Choose the correct answer below Choose all that apply A B C 2 2 7x 3x 4

In a newspaper s survey of 453 people 53 said that we should replace passwords wil biometric security such as fingerprints The accompanying Statdisk display results from test of the claim that half of us say that we should replace passwords with biometric sec Use the normal distribution as an approximation to the binomial distribution Use the dis and a 0 10 significance level to complete parts a through e Sample proportion 0 5298013 Test Statistic z 1 2686 Critical z 1 6449 P value 0 2046 a Is the test two tailed left tailed or right tailed Choose the correct answer below left tailed two tailed right tailed b What is the test statistic Z

b A paint company has developed a new paint formula which should have a faster drying time compared to the old formula Paint drying time is known to be normally distributed and from previous tests it is known that the original paint formula has a mean drying time of 14y 45 min 0 36 min2 The company s R D scientists believe the new formula will have a mean drying time of 2 35 min o 16 min2 that is they expect the new formula to dry an average of 10 min faster than the old formula or that 10 A scientist takes 16 samples of each paint formula and determines the mean drying time for each batch to be X 44 min and X2 36 min respectively Find a 90 confidence interval on the difference in average lifetime between the two populations 12

Estimating the Difference Between Two Means Known Variance a A car manufacturer outsources production of a certain automotive component The company has found a cheaper supplier supplier 2 but wants to make sure that the component is of the same quality The standard deviations in component lifetimes are known to be 1 000 miles and o 1 500 miles respectively 50 components from each supplier are tested and the average lifetime for the new supplier s component is 1 050 miles shorter compared to the original supplier s component that is X X 1 050 Find a 95 confidence interval on the difference in average lifetime between the two populations H