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28 September, 20:25

The average age of senators in the 108th congress was 57 years. if the standard deviation is 15 z score corresponding to the oldest senator is

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  1. 28 September, 22:18
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    The solution for this problem would be:

    Since you didn't give the oldest age of the senator, let us assume it is 86 years old.

    Now, the z score can be calculated by: z = X - mean / standard deviation.

    Plugging in our values:

    = 86 - 57 / 15 = 29 / 15 = 1.93333333 is the z score
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