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What is the probability that the sample mean

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Reference no: EM132514593

A population has a mean of 400 and a standard deviation of 90. Suppose a sample of size 125 is selected and is used to estimate.

-What is the probability that the sample mean will be within +/- 3 of the population mean (to 4 decimals)? (Round z value in intermediate calculations to 2 decimal places.)

-What is the probability that the sample mean will be within +/- 12 of the population mean (to 4 decimals)? (Round z value in intermediate calculations to 2 decimal places.)

Reference no: EM132514593

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