Refer to Exercise 12.

a. Compute the quantity s =??MSE, the estimate of the error standard deviation σ.

b. Assuming s to be the error standard deviation, find the sample size necessary in each treatment to provide a power of 0.90 to detect a maximum difference of 0.2 in the treatment means at the 5% level.

c. Using a more conservative estimate of 1.5_s as the error standard deviation, find the sample size necessary in each treatment to provide a power of 0.90 to detect a maximum difference of 0.2 in the treatment means at the 5% level.

Refer to Exercise 12.

Transcribed Image Text:

Collector Power A 1.9 1.6 2.0 1.8 1.6 B 1.7 1.9 1.8 1.7 1.7 1.2 0.9 1.2 0.9 1.4 0.9 D 1.5 1.0 1.4 1.3 1.4