QTM 100 EXAM 2 QUESTIONS AND ANSWERS
Complete the following sentence: When conducting a hypothesis test, we
_________________ and then evaluate the test results to determine if there is enough
evidence to ____________________. - Answers - a. Assume that the alternative
hypothesis is true; reject the null hypothesis
b. Assume the alternative hypothesis is false; reject the alternative hypothesis
c. Assume that the null hypothesizes false; accept the null hypothesis
d. Assume that the null hypothesis is true; reject the null hypothesis
For which value of p would the sampling distribution of the same proportion have the
largest variability? - Answers - a. 0.2
b. 0.5
c. 0.7
d. 0.9
Fifty Emory students were asked how many serious relationships they've been in so far,
which yielded a 95% confidence interval of (2.7, 3.7). Which of the following is the
correct interpretation of the confidence interval? - Answers - a. We are 95% confident
that the average number of serious relationships Emory students in this sample have
been in is between 2.7 and 3.7
b. We are 95% confident that Emory students on average have been in between 2.7
and 3.7 serious relationships
c. We are 95% confident that a randomly chosen Emory student has been in between
2.7 and 3.7 serious relationships
d. 95% of Emory students have even in 2.7 to 3.7 serious relationships
Thirty people were weighed before starting a 3-month diet program and again after they
completed the program. The change in weight was found by taking before weight minus
after weight. The test statistic is 3.15. What is the correct conclusion? - Answers - a. We
have strong statistically significant evidence to show that the population mean change in
weight was less than zero
b. We have strong statistically significant evidence to show that the population mean
change in weight was greater than zero
Complete the following sentence: When conducting a hypothesis test, we
_________________ and then evaluate the test results to determine if there is enough
evidence to ____________________. - Answers - a. Assume that the alternative
hypothesis is true; reject the null hypothesis
b. Assume the alternative hypothesis is false; reject the alternative hypothesis
c. Assume that the null hypothesizes false; accept the null hypothesis
d. Assume that the null hypothesis is true; reject the null hypothesis
For which value of p would the sampling distribution of the same proportion have the
largest variability? - Answers - a. 0.2
b. 0.5
c. 0.7
d. 0.9
Fifty Emory students were asked how many serious relationships they've been in so far,
which yielded a 95% confidence interval of (2.7, 3.7). Which of the following is the
correct interpretation of the confidence interval? - Answers - a. We are 95% confident
that the average number of serious relationships Emory students in this sample have
been in is between 2.7 and 3.7
b. We are 95% confident that Emory students on average have been in between 2.7
and 3.7 serious relationships
c. We are 95% confident that a randomly chosen Emory student has been in between
2.7 and 3.7 serious relationships
d. 95% of Emory students have even in 2.7 to 3.7 serious relationships
Thirty people were weighed before starting a 3-month diet program and again after they
completed the program. The change in weight was found by taking before weight minus
after weight. The test statistic is 3.15. What is the correct conclusion? - Answers - a. We
have strong statistically significant evidence to show that the population mean change in
weight was less than zero
b. We have strong statistically significant evidence to show that the population mean
change in weight was greater than zero
