Question: (Computer software is required.) In parts (a) to (d), find the sample size necessary to achieve power of .80 for a onesample t-test with Ha:

(Computer software is required.) In parts

(a) to (d), find the sample size necessary to achieve power of .80 for a onesample t-test with Ha: m . m0 and level of significance of .05 for each of the following effect sizes:

a. 0.2.

b. 0.4.

c. 0.6.

d. 0.8.

e. Make a scatterplot of the sample size (vertical axis)

versus the effect size for the effect sizes in parts

(a) to

(d). Does the relationship between the effect size and the sample size required to achieve 80% power appear to be linear? If not, what is the nature of the relationship?

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