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IQ test scores on a certain IQ scale are normally distributed with a mean of 100 and a standard
deviation of 12. An individual?s IQ score is found to be 127. Find the z-score corresponding to
this value.
Solution
z = (score - mean)/standard deviation z = (127 - 100)/12 = 27/12 = 2.25

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IQ test scores on a certain IQ scale are normally distributed with a.pdf

  • 1. IQ test scores on a certain IQ scale are normally distributed with a mean of 100 and a standard deviation of 12. An individual?s IQ score is found to be 127. Find the z-score corresponding to this value. Solution z = (score - mean)/standard deviation z = (127 - 100)/12 = 27/12 = 2.25