According to the text, the statistical approaches to determining sample size are based on confidence intervals that may involve the estimation of the ________ or ________.

According to the text, the statistical approaches to determining sample size are based on confidence intervals that may involve the estimation of the ________ or ________.



A) standard deviation; variance

B) variance; mean

C) mean; proportion

D) proportion; standard deviation

E) mode; median



Answer: C


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