Cameron is performing a study on the IQ of groups in various areas. He has calculated that the average IQ of Group A is 108 with a standard deviation of 8. What is the z-score for someone with an IQ of 112?
A) -0.50
B) 0.50
C) -0.30
D) 1.30

Question

Quizplus · Accepted Answer

The z-score is calculated using the formula z = (X - μ) / σ, where X is the value (112), μ is the mean (108), and σ is the standard deviation (8). Plugging in the values gives z = (112 - 108) / 8 = 4 / 8 = 0.50.

Cameron Is Performing a Study on the IQ of Groups