by Dawn Wright | Apr 10, 2017

Sometimes you are confronted with a deceptively simple-looking problem: Construct the indicated confidence interval for the population mean, µ. c = 0.90, x-bar = 16.2, s = 5.0, n = 75. To solve it you need to carefully inspect the data you are given. You should...
by Dawn Wright | Apr 10, 2016

Confidence Interval for Mean, µ. Large-sample 100*(1-α)% Confidence interval using Z-distribution where Zα/2 is the z-value corresponding to an area α/2 in the tail of the standard normal distribution, and σx ̅ is the standard deviation of the sampling distribution, σ...