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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 then IQ scores for girls. A typical study looking at 10-year-old children classifies participants by gender and by low, average, or high IQ. Following are hypothetical data representing the research results. Do the 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

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