AP Statistics Quiz
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SAMPLING DISTRIBUTIONS
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A phone battery model has a mean lifetime of μ=11\mu=11 hours under a standard test. A technician repeatedly selects random samples of n=25n=25 batteries and computes the sample mean lifetime xˉ\bar{x}. Assume the sampling distribution of xˉ\bar{x} is approximately normal. Which statement about the sampling distribution is correct?
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