MoiseL391637 MoiseL391637

30-10-2022
Mathematics

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IQ test scores scores on the Wechsler Adult Intelligence Scale (a standard IQ test ) for the 20 to 34 age group are approximately Normally distributed with μ=110 and σ=15. At what percentile is an IQ score of 130?

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BerelP55178 BerelP55178

30-10-2022

mean: 110

Standard deviation: 15

We have to apply the percentile formula:

z = (score- mean)/ standard deviation

z = (130-110)/15

z= 20/15

z= 1.3333333

Find the percentile with the z score in a z-score chart:

percentile:

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