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30 May, 19:33

Scores on a standardized test are normally distributed with a mean of 350 and a standard deviation of 25. Approximately what percent of students scored between 360 and 380?

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  1. 30 May, 20:59
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    (360) = 10/25 =.4

    z (380) = 30/25 = 1.2

    P (350 < x < 380) = normalcdf (.4, 1.2)
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