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Asked by Busisiwe

there are 500 passenger with a mean age of 60 years and a standard deviation of 12. what is the minimum age of the oldest 20%?
10 years ago

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Answered by Steve
P(Z>z) = 0.2
z = 70
10 years ago
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there are 500 passenger with a mean age of 60 years and a standard deviation of 12. what is the minimum age of the oldest 20%?

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