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    Christopher27's Avatar
    Christopher27 Posts: 1, Reputation: 1
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    #1

    Aug 28, 2011, 07:28 AM
    A random sample of 16 pharmacy customers showed the waiting times to have a mean of 1
    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's Avatar
    excon Posts: 21,482, Reputation: 2992
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    #2

    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
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