Test whether there is significant difference between the frequency distributions for male and female
Research results suggest that IQ scores for boys are more variable after that IQ scores for girls. A typical study looking at 10yearold children classifies participants by gender and by low, average, or high IQ. Following are hypothetical data representing the research results. Do data indicate a significant difference between the frequency distributions for male and females? Test at the .05 level of significance and describe the difference.

IQ





Low

Average

High


Boys

18

42

20

80

Girls

12

54

14

80





n = 160
