are more variable than IQ scores for girls (Arden & Research results suggest that IQ scores for boys representing the research results. Do the data indicate are more variable than IQ scores for girls (Arden & children classifies participants by gender and by low, Plomin, 2006). A typical study looking at 10-year-old average, or high IQ. Following are hypothetical data average, or high IQ. Following are representing the research results. Do the data indicate a significant difference between the frequency distri- butions for males and females? Test at the .05 level of significance and describe the difference. hypothetical data 1Q Low Average High Вoys 18 42 20 80 Girls 12 54 14 80 n = 160

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