College students had their personalities classified as either Type A or Type B, then reported to a lab where they were frustrated by an experimenter (he gave them anagrams that were unsolvable). Then the experimenter gave them a new set of (solvable) anagrams and timed how long it took them to solve them (in minutes). The following data was obtained:
GROUP 1=Type A, GROUP 2=Type B
GROUP n M SD
GROUP 1 10 5.34 1.194
GROUP 2 10 5.13 1.223
t = 1.67 df = 18 p = 0.257 Cohen's d = .21
A) What is the independent variable and scale of measurement for the IV?
B) What is the dependent variable and scale of measurement for the DV?
C) What kind of research design was used and how do you know this?
D) What kind of inferential statistical analysis was/should be used?
E) Write an APA-format conclusion including all relevant statistics.
F) Describe the effect size of these results and explain how you know this. Provide an appropriate APA-style reference to support your answer.