If there is a graded group assignment, I am entitled to the group’s score even if I do not  participate in doing the assignment   A.   True                           B.   False

A professor claims that for the population of statistics final exams in their classes, the mean score is not 85.0, given the following statistics from a random sampling. (n=100; x-bar=88.0; s=10.5, alpha=0.01). Answer the following questions:H0: mu [c1] 85.0 (enter correct sign(s))H1: mu [c2] 85.0 (enter correct sign(s))The claim is [m1] (enter either H1 or H0)The critical value on the left, if there is one = [cv1] (round to 3 decimals-if none, enter “na”)The critical value on the right, if there is one = [cv2] (round to 3 decimals-if none, enter “na”)The test statistic = [ts] (round to 3 decimals)The result of the hypothesis test of H0 is [result] (enter “reject H0” or “fail to reject H0”)Is the claim supported? [support] (“yes” or “no”)

An insurance company undertakes a study of distracted driving. In a random sampling of 390 drivers, 190 admit to being regularly distracted while driving (e.g., texting, changing music, eating/drinking, etc.). Use an alpha=0.05 to test the claim that half (50%) or more of all drivers are regularly distracted while driving. Answer the following questions:H0: p [c1] 50% (enter correct sign(s))H1: p [c2] 50% (enter correct sign(s))The claim is [m1] (enter H1 or H0)The critical value on the left, if there is one = [cv1] (round to 3 decimals-if none, enter “na”)The critical value on the right, if there is one = [cv2] (round to 3 decimals-if none, enter “na”)The test statistic = [ts] (round to 3 decimals)The result of the hypothesis test of H0 is [result] (enter “reject H0” or “fail to reject H0”)Is the claim supported? [support] (enter yes or no)

A professor claims that for the population of statistics final exams in their classes, the mean score is less than 85.0, given the following statistics from a random sampling. (n=60; x-bar=82.0; s=14.0, alpha=0.01). Answer the following questions:H0: mu [c1] 85.0 (enter correct sign(s))H1: mu [c2] 85.0 (enter correct sign(s))The claim is [m1] (enter either H1 or H0)The critical value on the left, if there is one = [cv1] (round to 3 decimals-if none, enter “na”)The critical value on the right, if there is one = [cv2] (round to 3 decimals-if none, enter “na”)The test statistic = [ts] (round to 3 decimals)The result of the hypothesis test of H0 is [result] (enter “reject H0” or “fail to reject H0”)Is the claim supported? [support] (“yes” or “no”)

A claim is made that the proportion of kids who play sports is not 33%. A sample of n=200 subjects is randomly selected, and data shows 29% play a sport. Assume an alpha of 0.20, and answer the following questions:H0: p [c1] 33% (enter correct sign(s))H1: p [c2] 33% (enter correct sign(s))The claim is [m1] (enter H0 or H1)The critical value on the left, if there is one = [cv1] (round to 3 decimals-if none, enter “na”)The critical value on the right, if there is one = [cv2] (round to 3 decimals-if none, enter “na”)The test statistic = [ts] (round to 3 decimals)The result of the hypothesis test of H0 is [result] (enter “reject H0” or “fail to reject H0”)Is the claim supported? [support] (enter yes or no)

A manager, upon seeing the test results from a random sampling of bottles of 16 oz. soda claims that the average weight of all such soda is not more than 16 oz. Answer the following questions, given the sample data alpha=0.10, sample size of 130, sample mean of 16.1 ounces, and standard deviation of 0.62 ounces.H0: mu [c1] 16 ounces (enter correct sign(s))H1: mu [c2] 16 ounces (enter correct sign(s))The claim is [m1] (enter H1 or H0)The critical value on the left, if there is one = [cv1] (round to 3 decimals-if none, enter “na”)The critical value on the right, if there is one = [cv2] (round to 3 decimals-if none, enter “na”)The test statistic = [ts] (round to 3 decimals)The result of the hypothesis test of H0 is [result] (enter “reject H0” or “fail to reject H0”)Is the claim supported? [support] (enter yes or no)

A claim is made that the proportion of kids who play sports is at least 33%. A sample of n=250 subjects is randomly selected, and data shows 28% play a sport. Assume an alpha of 0.01, and answer the following questions:H0: p [c1] 33% (enter correct sign(s))H1: p [c2] 33% (enter correct sign(s))The claim is [m1] (enter H0 or H1)The critical value on the left, if there is one = [cv1] (round to 3 decimals-if none, enter “na”)The critical value on the right, if there is one = [cv2] (round to 3 decimals-if none, enter “na”)The test statistic = [ts] (round to 3 decimals)The result of the hypothesis test of H0 is [result] (enter “reject H0” or “fail to reject H0”)Is the claim supported? [support] (enter yes or no)

A group of 62 randomly selected students have a mean placement test score of 28.3 with a standard deviation of 3.4. Based on a 90% confidence level, answer the following questions.What is E (the error value) used to find the confidence interval? [err] (round to 2 decimal places)The confidence interval for the population mean is [confL]

A random sample of repair costs for BMW’s involved in crashes consisted of 5 BMW’s, with repair costs shown in the table below. Use an alpha=0.10 to answer the following questions related to a claim that the mean repair cost for all BMW crashes is less than $3,100. $2,797 $2,571 $2,904 $3,147 $2,418 H0: mu [c1] $3,100 (enter correct sign(s))H1: mu [c2] $3,100 (enter correct sign(s))The claim is [m1] (enter H0 or H1)The critical value on the left, if there is one = [cv1] (round to 3 decimals-if none, enter “na”)The critical value on the right, if there is one = [cv2] (round to 3 decimals-if none, enter “na”)The test statistic = [ts] (round to 3 decimals)The result of the hypothesis test of H0 is [result] (enter “reject H0” or “fail to reject H0”)Is the claim supported? [support] (enter yes or no)

For each of the following scenarios, state the claim and whether or not it is supported. A.  A researcher claims that men, on average, can’t wait even 5.0 seconds without pressing a button on the tv remote control (i.e., average time between remote control use).  Assuming that a hypothesis test has been conducted and that the conclusion is to reject the null hypothesis, answer the following questions.    The claim is an [claim1] (enter H0 or H1) and is mu [symbols1] 5.0 seconds (enter correct sign(s))   Is the claim supported? [support1] (enter yes or no) B.  A cereal company claims that the proportion of cereal boxes that meet its weight specification is at least 95%. Assuming that a hypothesis test has been conducted and the conclusion is, fail to reject the null hypothesis, answer the following questions.    The claim is an [claim2] (enter H0 or H1) and is p [symbols2] 95% (enter correct sign(s))   Is the claim supported? [support2] (enter yes or no) C.  A manufacturer claims that the standard deviation in temperature in their refrigerators is no more than 2.2 degrees F. Assuming that a hypothesis test of the claim has been conducted and that the conclusion is to reject the null hypothesis, answer the following questions. The claim is an [claim3] (enter H0 or H1) and is sigma [symbols3] 2.2 degrees (enter correct sign(s))   Is the claim supported? [support3] (enter yes or no)