Question: random sample testing

I am trying to get Maple to calculate this for me:

Let X1,X2,...X81 be a random sample from a distsribution (not necessarily normal) with mean µ=49 and standard deviation σ =8. Let ¯X = (1/81)* ∑i=181 * Xi

I need to find the mean, the standard deviation and the approximate distribition of ‾X,


BTW, the 81 goes directly over the ∑ and the i=1 goes directly under. the Line should be directly over the X but I am not sure how to do that here.

Thank you!

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