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The mean output of a certain type of amplifier is 496 watts with a variance of 144 . If 40 amplifiers are sampled, what is

The mean output of a certain type of amplifier is 496

watts with a variance of

144.

If40

amplifiers are sampled, what is the probability that the mean of the sample would differ from the population mean by less than1.2

watts? Round your answer to four decimal places.

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