Question: Let A ^ . - . ^ b e a random sample of size n from a random phenomenon (the Xj take nonnegative values only)

Let A ^ . - . ^ b e a random sample of size n from a random phenomenon

(the Xj take nonnegative values only) with finite mean |x. Show that the probability that 2 ?= t X { exceeds some constant a is not greater than n\±/a.

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