Reference no: EM132857343

2. What is the appropriate test (from among the one-sample Z-test, one-sample t-test, independent groups t-test, or related samples t-test) for each of the following problems?

a) Comparing the activity levels of 50 rats exposed to a hallucinogenic drug in gaseous form to that of a group of 50 rats exposed to an inert drug?

b) Comparing the mean exam score of students who wrote a deferred exam (a sample of 12 students) to the overall class mean (standard deviation of the class is known)?

c) Comparing the mean exam score of students who wrote a deferred exam (a sample of 12 students) to the overall class mean (standard deviation for the class is not known)?

d) Comparing the mean exam score of students who wrote a deferred exam (a sample of 12 students) to the overall class mean (standard deviation for both the sample and the class is known)?

e) Two forms of an activity-based cognitive test (with the same number of puzzles) are given to a single group of 30 chimps. Is there a difference between the average scores on the two test forms?

f) Investigating if a sample of 12 new Toyotas, based on the mean number of manufacturing flaws they have, was likely to have been produced at the Cambridge plant, given that we know the mean but not the standard deviation of the number of flaws in cars produced at that plant?

g) Comparing the average graduating GPA of Psych majors to that of Sociology majors?