Chapter 7 Discussion

Population birth weights of boys and girls are estimated with a 95% confidence interval (measured in hectograms (hg))

A 95% confidence interval for the population mean birth weight for boys is:  31.8 hg < μ < 33.6 hg

A 95% confidence interval for the population mean birth weight for girls is:   29.3 hg < μ < 32.5 hg

These intervals overlap which means each of the following three conclusions are possible…Explain how each of the following conclusions could be true…(use the limits of the confidence intervals, use correct units of measure, include statistical values in each explanation, and use statistical vocabulary, and correct spelling and punctuation and sentence structure):

1. The population mean birth weight of boys is greater
2. The population mean birth weight of girls is greater
3. The population mean birth weight of boys and girls are the same

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