A sample mean, sample size, population standard deviation, and confidence level are provided. Use this information to complete parts a) below. x overbarxequals=2121, nequals=3232, sigmaσequals=33, confidence levelequals=9595% a) Use the one-mean z-interval procedure to find a confidence interval for the mean of the population from which the sample was drawn.
We are asked to find the confidence level of the mean of the population that a sample was drawn from. The data from the sample is `bar(x)=21, n=32, sigma=3` with a 95% confidence (`alpha=.05` )
Since we know the standard deviation of the population we use the standard normal table (`z-` table.)
The confidence interval...
(The entire section contains 171 words.)
check Approved by eNotes Editorial