Question

A random sample of 9-year-olds yielded the following results. At α=0.05, do the data support the...

A random sample of 9-year-olds yielded the following results. At α=0.05, do the data support the claim that there is a difference in the average heights?

Heights of Boys and Girls

Boys

Girls

Sample size

60

50

Mean height (cm)

123.5

126.2

Population variance

98

120

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