Posted by martha on Thursday, July 31, 2014 at 6:12pm.
The following list is a sampling of the costs of various statistics textbooks used at several colleges. Give the upper confidence limit for a 95% confidence interval estimate for the mean cost of all statistics textbooks.
109.95; 92.00; 96.70; 84.85; 92.60; 84.45; 90.95; 77.00; 75.50

statistics  MathGuru, Thursday, July 31, 2014 at 8:01pm
Formula:
CI95 = mean ± 1.96(sd/√n)
You will need to calculate the mean and standard deviation for your data. In the formula, n = sample size.
Once you have what you need, substitute into the formula and determine the confidence interval.
I hope this will help get you started.

statistics  Mabel, Thursday, May 12, 2016 at 8:41am
28.22
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