15.42 More pooling.
Refer to Exercise 15.40. Here are the standard deviations for total thoughts:
| Repetition | |||
| Familiarity | 1 | 2 | 3 |
| Familiar | 1.63 | 1.42 | 1.52 |
| Unfamiliar | 1.64 | 2.16 | 1.59 |
Assuming that the cell sizes are equal, find the pooled estimate of the standard deviation for these data. Use the rule for examining standard deviations in ANOVA from Chapter 14 (page 720) to determine if it is reasonable to use a pooled standard deviation for the analysis of these data.