What is the z-score for a value 1.5 standard deviations below the mean?
And how did you find it?
Thanks!!
And how did you find it?
Thanks!!
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You need to look up a Z-table which has values of Z for different standard deviations and you can just read off values
Z(-1.5) = 0.0668
Z(-1.5) = 0.0668