Let X 1 ,X 2 , ... be a sequence of independent r.v.s uniformly distributed on the
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Let X1,X2, ... be a sequence of independent r.v.’s uniformly distributed on the interval [0,2], and let Sn = X1 + ... + Xn.
(a) Find E{Sn} and Var{Sn}.
(b) Using the Central Limit Theorem, estimate P(n − √n ≤ Sn ≤ n + √n).
(c) Write down a formula for the limit of
Proceeding from the formula you have obtained, explain why the accuracy with which the average X̅n = Sn is close to 1 has an order of 1/√n.
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a Since EX 1 and VarX 2 1 we have ES n and Var Sn b Pn ...View the full answer
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