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23 January, 05:56

If a normal distribution has a mean of 132 and a standard deviation of 20, what is the value that has a z-score of 2.4?

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  1. 23 January, 06:12
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    The z-score of a certain number in a normally distributed data is calculated through the equation,

    z-score = (value - mean) / standard deviation

    Substituting the known values,

    z-score = (2.4 - 132) / 20 = - 6.48

    Thus, the z-score of 2.4 is equal to - 6.48.
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