A population has a mean of 300 and a standard deviation of 80. Suppose a sample of size 100 is selected and x (with a bar over the x) is used to estimate mu. Use z-table.
a. What is the probability that the sample mean will be within +/- 7 of the population mean (to 4 decimals)?
b. What is the probability that the sample mean will be within +/- 13 of the population mean (to 4 decimals)?
Get Answers For Free
Most questions answered within 1 hours.