Question

ˉ

=55σ=8n=40 With 99% confidence, when n=40 the population mean is between a lower limit of and an upper limit of (Round to two decimal places as needed.)

Answer 1

We can estimate the population mean with 95 percent confidence using the sample mean and standard deviation.

Step-by-step explanation:

We know that there is a 95 percent chance that the true population mean value μ is between two standard deviations from the sample mean. That is, with 95 percent confidence we can say that μ is between x - 2x and x + 2x.