Question
A population has a mean of 300 and a standard deviation of 80. Suppose a sample...
A population has a mean of 300 and a standard deviation of 80. Suppose a sample of size 125 is selected and is used to estimate . Use z-table.
- What is the probability that the sample mean will be within +/-
8 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 +/- 11 of the population mean (to 4 decimals)? (Round z value in intermediate calculations to 2 decimal places.)
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