(Answered) Can anyone help me with this problemlet s2nbspbe the sample

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Can anyone help me with this problem?

Let S² be the sample variance of a random sample of size n from N(μ,?), ? > 0, where μ is known

Find I(?)
Compute the efficiency of S², that is, Var(S²)/Rao-Cramer lower bound. Recall that E(S²) = ? and the distribution of W = (n - 1)S²/ ? is a well known, and you know how to compute its variance

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