4. Conduct (and interpret) Fisher's LSD test (alpha = .05) on the following data. The data represent the number of errors made on a word recall test. Be sure to state which differences are significant.

(4 points)

7-year-olds 9-year-olds 11-year-olds

sample mean 15 12 11

sample size 6 6 6

MS_error = 7.00 df_error= 15

1. What is the critical value for the above test?
2. Compute all pairwise comparisons.

1. Interpret your findings.