The Perry Preschool Project data presented in Exercise 10.39 (Schweinhart et al. 2005) can be divided to see whether the preschool attendance effect is different for males and females. The table shows a summary of the data for females, and the figure shows Minitab output that you may use.

a. Find the graduation rate for those females who went to preschool, and compare it with the graduation rate for females who did not go to preschool.
b. Test the hypothesis that preschool and graduation rate are associated, using a significance level of 0.05.

Transcribed Image Text:

Chi-Square Test: Preschool, No Preschool: Girls Expected counts are printed below observed counts Preschool Preschool Total 21 14.50 Grad 8 14.50 29 No Grad 4 10.50 17 10.50 21 Total 25 25 50 chi-sq = 13.875, DF- 1, P-value = 0.000 Minitab Output for the Girls Only Preschool No Preschool HS Grad 21 HS Grad No 17