A random sample of 49 lunch customers was taken at a restaurant. The average amount of time these customers stayed in the restaurant was 45 minutes with a standard deviation of 14 minutes.
a. Compute the standard error of the mean.
b. With a .95 probability, what statement can be made about the size of the margin of error?
c. Construct a 95 confidence interval for the true average amount of time customers spent in the restaurant.
d. With a .95 probability, how large of a sample would have to be taken to provide a margin of error of 2.5 minutes or less?
Question 2
A production process that is in control has a mean () of 200 and a standard deviation () of 22. Determine the lower and the upper control limits for sample sizes of 49.
Time Line of Human History From Upper Paleolithic Period to the Present
Sample Advance Directive Cont.
A sample flow sheet.
Many gasoline service stations have signs posted warning customers to place plastic fuel containers ...
Sample prescriptions of drugs for oral fungal infections.
Sample of résumé content.