Question: When the sample standard deviation S is based on a random sample from a normal population distribution, it can be shown that E(S) = V2/(n

When the sample standard deviation S is based on a random sample from a normal population distribution, it can be shown that E(S) = V2/(n - 1) I(n/2)/T((n - 1)/2) Use this to obtain an unbiased estimator for 7 of the form cS. What is c when n = 18? (Round your answer to four decimal places.)

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