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lcribb:
The mean life expectancy of a certain type of light bulb is 895 hours with a standard deviation of 18 hours. What is the approximate standard deviation of the sampling distribution of the mean for all samples with n = 40? 2.85 h 2.22 h 0.60 h 0.45 h
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Vocaloid:
sample standard deviation = population standard deviation / sqrt(sample size)
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