Question

3. How many Kleenex should the Kimberly Clark Corporation package of tissues contain? Researchers determined that 60 tissues is the average number of tissues used during a cold. Suppose a random sample of 100 Kleenex users yielded the following data on the number of tissues used during a cold, the sample mean is 52 and the sample standard deviation is 22. Suppose that the test statistic does fall in the rejection region at alpha = 0.05. Which of the following conclusions is correct?

a. at alpha = 0.05, there is insufficient evidence to conclude that the average number of tissues used during a cold is 60 tissues.

b. at alpha = 0.05, there is sufficient evidence to conclude that the average number of tissues used during a cold is 60 tissues.

c. at alpha= 0.05, there is insufficient evidence to conclude the average number of tissues used during a cold is not 60 tissues.

d. at alpha = 0.10, there is sufficient evidence to conclude that the average number of tissues used during a cold is not 60 tissues.

e. at alpha = 0.01, there is sufficient evidence to conclude that the average number of tissues used during a cold is not 60 tissues.

Answer 1

d. at alpha = 0.10, there is sufficient evidence to conclude that the average number of tissues used during a cold is not 60 tissues.