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A population with a mean of 1,250 and a standard deviation of 400 is known to...

A population with a mean of 1,250 and a standard deviation of 400 is known to be highly skewed to the right. If a random sample of 64 items is selected from the population, what is the probability that the sample mean will be more than 1,325?

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Answer #1

P(Z > 1.5) is calculted in R using command

pnorm(1.5, 0, 1, lower.tail = FALSE)

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