Mathematics, 12.03.2020 16:29, paypay319
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?
Answers: 1
and standard deviation 
, the sample means with size n of at least 30 can be approximated to a normal distribution with mean 
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The mean life expectancy of a certain type of light bulb is 895 hours with a standard deviation of 1...
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