A nutritionist wishes to conduct a survey among a population of adolescent girls to determine their average
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Question:
A nutritionist wishes to conduct a survey among a population of adolescent girls to determine their average daily protein intake (in grams). She assumes the standard deviation in protein intake to be 20g. She would like her estimate to be within 5g of the population mean in either direction. What sample size is needed if she wants to present her result with a 95% CI and a response rate of 90%?
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