A population has a mean of 200 and a standard deviation of 80. Suppose a sample...

Question

Question

A population has a mean of 200 and a standard deviation of 80. Suppose a sample of size 100 is selected and x̅ is used to estimate μ.

a. What is the probability that the sample mean will be within +/- 9 of the population mean (to 4 decimals)?

b. What is the probability that the sample mean will be within +/- 14 of the population mean (to 4 decimals)?

Answer 1

Answer #1

Answer 2

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