Exercise 07.15 Algo (Sampling Distribution of x) A population has a mean of 300 and a standard deviation of 90. Suppose a simple random sample of size 100 is selected and is used to estimate $\mu$. Use z-table. a. What is the probability that the sample mean will be within ±8 of the population mean (to 4 decimals)? b. What is the probability that the sample mean will be within ±10 of the population mean (to 4 decimals)?
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