A population of size 320 has a proportion equal to .60 for the characteristic of interest. What are the mean and the standard deviation, respectively, of the sample proportion for samples of size 12?

A population of size 320 has a proportion equal to .60 for the characteristic of interest. What are the mean and the standard deviation, respectively, of the sample proportion for samples of size 12?


a. .60 and.14

b. 192 and 45

c. .60 and.02

d. 320 and.02


Answer: a. .60 and.14


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