Developmental Psychologists Study Children at Different Ages

Essay

Developmental psychologists study children at different ages. In this study, the children were tested three times, at ages 10, 11 and 12. At each age, they worked a set of 25 logic problems. The scores below represent percentage correct on the set of 25 problems. Calculate a repeated-measures ANOVA, Tukey HSD tests, and write an interpretation. $$\begin{array} { c r r r } && { \text { Age } } \\\text { Child } & 10 & 11 & 12 \\\hline 1 & 0 & 8 & 40 \\2 & 8 & 12 & 36 \\3 & 12 & 24 & 36 \\4 & 16 & 20 & 48\end{array}$$