jblock7866 jblock7866

26-10-2017
Mathematics

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Test scores are normally distributed with a mean of 100 and a standard deviation of 15. an individual's iq score is found to be 90. find the z-score corresponding to this value.

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tynollette tynollette

26-10-2017

Z score=(data value-mean)/standard deviation
z=(90-100)/15=-0.6666666667

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