Question: The following MINITAB output presents a power calculation. a. ? What is the power requested by the experimenter? b. To guarantee a power of 0.864138,

The following MINITAB output presents a power calculation.

Alpha 0.05 Assumed standard deviation = 142.6 Number of Levels = 4

a.?What is the power requested by the experimenter?

b. To guarantee a power of 0.864138, how many observations must be taken for all treatments combined?

c. What is the difference between treatment means that can be detected with a power of at least 0.864138?

d. Is the power to detect a maximum difference of 250 greater than 0.864138 or less than 0.864138? Explain.

Alpha 0.05 Assumed standard deviation = 142.6 Number of Levels = 4 SS Means 20000 Sample Size Target Power 0.85 Maximum Difference 200 Actual Power 14 0.864138 The sample size is for each level.

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