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Course: AP??/College Statistics?>?Unit 9
Lesson 6: Sampling distributions for sample meansMean and standard deviation of sample means
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Problem
A light bulb manufacturer claims that a certain type of bulb they make has a mean lifetime of hours and a standard deviation of hours. Each package sold contains of these bulbs. Suppose that each package represents an of bulbs, and we calculate the sample mean lifetime of the bulbs in each package.
Calculate the mean and standard deviation of the sampling distribution of .