10. Birth Weights of Boys Use these summary statistics for birth weights of 195 boys: x = 32.7 hg, s = 6.6 hg (based on Data Set 4 “Births" in Appendix B). Use a 95% confidence level. Are the results very different from those found in Exercise 9? Does it appear that boys and girls have very different birth weights?
10. Birth Weights of Boys Use these summary statistics for birth weights of 195 boys: x = 32.7 hg, s = 6.6 hg (based on Data Set 4 “Births" in Appendix B). Use a 95% confidence level. Are the results very different from those found in Exercise 9? Does it appear that boys and girls have very different birth weights?
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Transcribed Image Text:10. Birth Weights of Boys Use these summary statistics for birth weights of 195 boys:
x = 32.7 hg, s = 6.6 hg (based on Data Set 4 “Births" in Appendix B). Use a 95% confidence
level. Are the results very different from those found in Exercise 9? Does it appear that boys and
girls have very different birth weights?

Transcribed Image Text:Confidence Intervals. In Exercises 9–-24, construct the confidence interval estimate of
the mean.
Expert Solution

Step 1
M = 32.7
t = 1.97
sM = √(6.62/195) = 0.47
μ = M ± t(sM)
μ = 32.7 ± 1.97*0.47
μ = 32.7 ± 0.932
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