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Thread: Confidence Interval

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    Confidence Interval




    Construct a 90% confidence interval on the population mean if a random sample of 25 items taken from a normally distributed population with a variance of 2600 had an average of 42.1

    Please someone explain how to do this in great detail.

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    Re: Confidence Interval


    Quote Originally Posted by SpaceElephant View Post
    Construct a 90% confidence interval on the population mean if a random sample of 25 items taken from a normally distributed population with a variance of 2600 had an average of 42.1
    Thank you! Now I have done that.

    Quote Originally Posted by SpaceElephant View Post
    Please someone explain how to do this in great detail.
    Search on the internet. Or on this site. It is a very common question. And it has been explained in great detail on the universities and the You tube.

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