Question: Example 6.4 (page 160) tested a therapy for anorexia, using H0: = 0 and Ha: > 0 about the population mean weight change. (a)

Example 6.4 (page 160) tested a therapy for anorexia, using H0: μ = 0 and Ha:μ > 0 about the population mean weight change.

(a) In the words of that example, what is a (i) Type I error? (ii) Type II error?

(b) The P-value was 0.018.

If the decision for α = 0.05 were in error, what type of error is it?

(c) Suppose instead α = 0.01.

What decision would you make? If it is in error, what type of error is it?

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