Let X1, X2,....,Xn be a random sample of size n from the normal distribution . Calculate the expected length of a 95% confidence interval for assuming that n=5 and the variance is:

a. known

b. unknown

Thank you for any help!

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- May 28th 2009, 09:22 PMredpackconfidence interval
Let X1, X2,....,Xn be a random sample of size n from the normal distribution . Calculate the expected length of a 95% confidence interval for assuming that n=5 and the variance is:

a. known

b. unknown

Thank you for any help! - May 29th 2009, 02:06 AMmahefo