Normally distributed with a mean


In a certain population, body weights are normally distributed with a mean of 152 pounds and a standard deviation of 26 pounds. How many people must be surveyed if we want to estimate the percentage who weighs more than 180 pounds? Assume that we want 96% confidence that the error is no more than 2 percentage points.

A) 923

B) 1267

C) 2628

D) 2001

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Basic Statistics: Normally distributed with a mean
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