Probability that random sample produces full-length movies, Basic Statistics

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Probability that random sample produces full-length movies

The length of children's full-length movies are known to follow a normal distribution with a mean of 78 minutes and a SD of 25 minutes.

Calculate the probability that a random sample of 40 children's full-length movies produces an average length of 85 minutes or more.

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Basic Statistics: Probability that random sample produces full-length movies

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