Using a standard deviation of 15 IQ points, a person with an obtained IQ score of 115 would have a z score of:
A) +1
B) +2
C) 0
D) −1

Name: Using a standard deviation of 15 IQ points, a person with an obtained IQ score of 115 would have a z score of: A) +1 B) +2 C) 0 D) −1
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Question

Quizplus · Accepted Answer

A z-score represents how many standard deviations an element is from the mean. In this case, with a mean IQ of 100 and a standard deviation of 15, an IQ of 115 is 1 standard deviation above the mean, hence a z-score of +1.

Using a Standard Deviation of 15 IQ Points, a Person