Let Y1 < Y2 < Y3 < Y4 be the order statistics of a random sample of size n = 5 (Y1 < Y2 < Y3 < Y4 <Y5). from the distribution having pdf f(x) = e−x, 0 < x < ∞, zero elsewhere. Find P(Y5 ≥ 3).
is the order statistics of a random sample of size n=5 from the distribution having pdf
, where the random sample is , n=5
Since if maximum of the sample is less than 3, implies each sample observation is less than 3.
, since, a random sample is always independently and identically distributed.
So,
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