Question

A population consists of 500 items. A sample of size 49 is selected, and the mean is 40 and the standard deviation 9. develop a 99 percent confidence interval for the population mean.

Answer 1

start by finding the margin of error

Answer 2

knw how to find margin of error for 99% confidence interval ?

Answer 3

ok im gonna try and do that

Answer 4

after that then i use another formula right?

Answer 5

yes, rest is easy.
finding margin of error is the only tricky part

Answer 6

knw how to figure out whats the \(Z^*\) value for 99% Confidence Interval ?