Interpret the interval. What does it mean?
2. Test to see if a population mean is greater than the assumed (or historical) value of 16. When a sample of 1000 was taken the sample mean was computed to be 15.95 and the sample standard deviation was 4.2.© BrainMass Inc. brainmass.com June 3, 2020, 9:51 pm ad1c9bdddf
Z Value for 95% CI = 1.96
Upper CI = Mean + z * std dev / sqrt(n)
Lower CI = Mean - z * std dev / sqrt(n)
Upper CI = 15.95 + 1.96* 4.2 / SQRT(1000) = ...
Provides steps necessary to compute the confidence interval and test population mean.