Question

In: Statistics and Probability

The probability that a radio will last more than 5 years is 0.87. From a batch...

The probability that a radio will last more than 5 years is 0.87. From a batch of 400 such radios, what is the probability that:

a) More than 327 and less than 349 radios will last more than 5 years?

b) Exactly 356 of them will last more than 5 years?

c) Less than 368 of them will last more than 5 years?

Solutions

Expert Solution

Refer Standard normal table/Z-table to find the probability OR use excel formula "=NORM.S.DIST(0.2230, TRUE)" & "=NORM.S.DIST(-3.1965, TRUE)" to find the probability.

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Refer Standard normal table/Z-table to find the probability OR use excel formula "=NORM.S.DIST(1.2637, TRUE)" & "=NORM.S.DIST(1.1151, TRUE)" to find the probability.

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Refer Standard normal table/Z-table to find the probability OR use excel formula "=NORM.S.DIST(2.8992, TRUE)" to find the probability.

orchestra answered 1 year ago

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