In 1990, the mean height of women 20 years old age or older was 63.7 inches, with a standard deviation of 2.1 inches, based on data obtained from the Centers for Disease Control and Prevention's Advance Data Report, No. 347. Suppose that a random sample of 45 women who are 20 years of age or older today results in a mean height of 64.2 inches. Use minitab to determine if there is reason to believe the mean height of women has increased, use ? = 0.10.
State the null and alternative hypotheses:
Determine the test statistic from minitab:
Determine the p-value from minitab:
Decision:
Conclusion: