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Christopher27
Aug 28, 2011, 07:28 AM
A random sample of 16 pharmacy customers showed the waiting times to have a mean of 19.88 minutes and a standard deviation of 3.649 minutes. A) Find a 90 percent confidence interval for μ, assuming that the sample is from a normal population. B) How could the confidence interval be made narrower?

excon
Aug 28, 2011, 07:36 AM
Hello C:

We HELP people with homework... We DON'T DO the homework for them.. So, why don't YOU tell us what you think, and we'll converse with you?

excon