Suppose that the mean height for women at a large company is assumed to be 70...

Suppose that the mean height for women at a large company is assumed to be 70 inches with a standard deviation of 3 inches.

If the women are placed randomly into classes of 36 each, what will be the standard deviation of the class means for height (i.e. the standard error of the mean)?
Using your answer to part (a), what is the z score for a class whose average height is 67.2 inches? What is the two-tailed p-value for this class?
If you were testing the null hypothesis (i.e. μ=70), would you reject H₀ for this class at the 0.05 level for a two-tailed test?

Solutions

Expert Solution

1. The standard deviation of the class means for height (i.e. the standard error of the mean)

2. The z score for a class whose average height is 67.2 inches

orchestra answered 1 year ago

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