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29 July, 09:50

Find the value of z such that 0.9722 of the area lies between - z and z. Round your answer to two decimal places.

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  1. 29 July, 10:11
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    -2.20 < z < 2.20

    Step-by-step explanation:

    You are saying the entire area = 0.9722

    so 1 - 0.9722 = 0.0278

    then we want it to fit in the middle of the normal curve with center 0

    so ...

    0.0278/2 = 0.0139 this corresponds to 2.20 on the z-score chart
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