Mathematics, 06.03.2021 06:50 dreamn6651

According to a recent report, people smile an average of μ = 62 times per day. Assuming that the distribution of smiles is approximately normal with a standard deviation of sigma σ =18, What proportion of people smile less than 80 times a day?

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According to a recent report, people smile an average of μ = 62 times per day. Assuming that the dis...

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