The mean life of a television set is 138 months with a variance of 324. If a sample of 83 televisi

SoccerBoss
Category:
Statistics
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Question description

The mean life of a television set is
138
months with a variance of
324
.
If a sample of
83
televisions is randomly selected, what is the probability that the sample mean would be less than
143.4
months? Round your answer to four decimal places.

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