set 08

First report: Use the Honolulu Heart Study (HHS) dataset to calculate the sample mean, sample standard deviation, and sample size for body height values comparing men of moderate activity level with men of high activity level.  State and discuss an appropriate null hypothesis.

Second report: Use the U.S. counties dataset to calculate, compare, and discuss the 95% confidence interval estimate (95% CIE = mean ± two standard errors) for mean infant mortality rate among Alabama counties with the 95% CIE for mean infant mortality rate for Texas counties.  State and discuss an appropriate null hypothesis.

OPTIONAL EXTRA-CREDIT report: Use the U.S. counties dataset to create a x:y scatterplot graph comparing % of population under 18 years and infant mortality rate for all Texas counties, and discuss their statistical correlation using an appropriate null hypothesis.

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