A population has a mean of 200 and a standard deviation of 50. Suppose a simple random 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 ±5 of the population mean? b. What is the probability that the sample mean will be within ±10 of the population mean?
A population has a mean of 200 and a standard deviation of 50. Suppose a simple random 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 ±5 of the population mean?
b. What is the probability that the sample mean will be within ±10 of the population mean?
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