Mean-standard deviation of the sampling distribution

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Reference no: EM1315725

Given a population of batteries has a mean lifespan of 1000 hours and a standard deviation of 56 hours and that the lifespan is normally distributed.

a) What is the mean and standard deviation of the sampling distribution when we take all samples of size25?

b) If we take larger size sample which of the values (for the mean and standard deviation found in part a) above will change and will it go up or down?

Reference no: EM1315725

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