In a study, 119119 children of a certain race in a certain city were randomly assigned to one of two groups: one group enrolled in a preschool, and the other group did not. A research question was whether attendance at preschool had an effect on high school graduation. The accompanying table shows whether the students graduated from regular high school or not and includes both boys and girls. Find a 9595% confidence interval for the difference in proportions, and interpret it.
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Step 1: Calculate percentages
Looking at children who went to preschool, StartFraction 41 Over 64 EndFraction
41
64, or 64.164.1%, graduated from high school. Looking at the children who did not go to preschool, what percent graduated from high school?
nothing% of children who did not go to preschool graduated from high school.