Posted by Meh on .
A sample of 300 is taken and the sample mean is computed to be 7.65 and the sample standard deviation is 5. Assume the data is ratio level.
Compute the 95% confidence interval on the mean.
Compute the 3.9% confidence interval on the mean
Which confidence interval is more practical and useful in a business situation? Why?

RES 341 
SraJMcGin,
If this is statistics, see if any of the following links will help:
http://search.yahoo.com/search?fr=mcafee&p=statistics+tutorial
Sra