Question

Girls ?̅ = 30.4 hg ? = 7.1 hg ? = 205

Boys ?̅ = 30.4 hg ? = 7.1 hg ? = 205

In a study on birth weights, the following summary statistics are found:
Use a 95% confidence level to construct the confidence interval estimates of the mean for each set of summary statistics.
Which score (? or ?) should be used as the critical value? __________________
The confidence interval for the birth weight of girls is __________________ < ? < _________________.
The confidence interval for the birth weight of boys is _________________ < ? < _________________.
Does it appear that boys and girls have very different birth weights? Support your answer.

Answer 1

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