(Answered) A random sample size of 41 is produced from a normal

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A random sample size of 41 is produced from a normal population with mean u and a standardd deviation sigma = 1. Let X(estimated) = _(i=1E⁴⁰X_i)/40 be the sample mean of the first random variables in this random sample. Find the probability that . I X₄₁-X(estimated)I < 0.5

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