Scientists Want to Estimate the Mean Weight Gain of Mice

question 62

Multiple Choice

Scientists want to estimate the mean weight gain of mice after they have been fed a special diet. From previous studies, it is known that the weight gain is normally distributed with standard Deviation 2 grams.
How many mice must be weighed so that a 99% confidence interval for mean weight will have a margin Of error of 0.4 grams?

• A) 26
• B) 1
• C) 13
• D) 166

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