In: Statistics and Probability
Music seems to be everywhere in society, and psychologists have investigated its effects on a variety of performances. For example, suppose an experimenter created three equivalent groups of eight people each and asked each person to perform a proofreading task on a short research paper. Subjects in group A1 performed the task with no music playing in the background, subjects in group A2 performed the task with a selection of oldies playing in the background, and subjects in groups A3 performed the task while listening to hard rock. The dependent variable was the errors detected out of a possible 50. Suppose the following scores were obtained:
No Music (A1) |
Oldies (A2) |
Hard Rock (A3) |
40 |
34 |
26 |
41 |
39 |
24 |
39 |
38 |
19 |
36 |
40 |
23 |
35 |
34 |
18 |
32 |
35 |
21 |
31 |
29 |
23 |
34 |
36 |
29 |
A. Analyze the scores with a one-factor between-subjects ANOVA to answer the question: Did the music condition affect the number of errors detected by a subject? Use α = .05. If needed, use the Tukey HSD test for multiple (pairwise) comparisons and include effect size.
B. Report the results of this experiment as it would appear in a research paper.