A researcher examined whether the time of day someone exercises affects memory retention in college courses. Participants were assigned to one of three exercise groups: morning, afternoon, evening, and their performance on a memorization task was measured. This data is below:
Morning | Afternoon | Evening |
6 | 4 | 7 |
7 | 5 | 6 |
8 | 6 | 8 |
5 | 4 | 6 |
6 | 5 | 5 |
Mean = 6.40 | Mean = 4.80 | Mean = 6.40 |
s = 1.14 | s =.84 | s = 1.14 |
Assuming the researcher wants to know whether the performance was different in these groups (alpha = .05). What is the Total Sum of Squares (SST)? Round to two decimal places.
A researcher examined whether the time of day someone exercises affects memory retention in college courses. Participants...
1. We reject the null hypothesis only when: a. our sample mean is larger than the population mean. b. the p value associated with our test statistic is greater than the significance level of the test we have chosen. c. our sample mean is smaller than the population mean. d. the p value associated with our test statistic is smaller than the significance level of the test we have chosen. 2. In a study of simulated juror decision making, researchers...