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8 July, 15:33

Under the normal curve, approximately what percent of scores fall between and - 1 to + 1 standard deviations around the mean?

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  1. D
    8 July, 16:25
    0
    According to the empirical rule, roughly 68% of the scores fall between z = - 1 and z = 1

    You can use a calculator to get a more approximate answer. If you have a TI calculator, you can use the "normalcdf" function to type in normalcdf (-1,1)
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