IQ test scores are normally distributed with a mean of 104 and a standard deviation of 17. An individual's IQ score is found to be 115. Find the z-score corresponding to this value.
A) 0.65
B) 1.55
C) -0.65
D) -1.55

Question

Quizplus · Accepted Answer

The z-score is calculated using the formula: z = (X - μ) / σ, where X is the score, μ is the mean, and σ is the standard deviation. Here, z = (115 - 104) / 17 = 0.65.

IQ Test Scores Are Normally Distributed with a Mean of 104