Verbal SAT scores have a mean of 500 and a standard deviation of 100. Which of the following describes how to find the proportion of Verbal SAT scores that are greater than 600?
A) Find the area to the left of z = 1 under a standard normal curve.
B) Find the area between z =-1 and z = 1 under a standard normal curve.
C) Find the area to the right of z = 1 under a standard normal curve.
D) Find the area to the right of z = -1 under a standard normal curve.

Question

Quizplus · Accepted Answer

To find the proportion of scores greater than 600, you first calculate the z-score for 600 using the formula $z = \frac{(X - \mu)}{\sigma}$, where $X$ is 600, $\mu$ is 500, and $\sigma$ is 100. This gives $z = \frac{(600 - 500)}{100} = 1$. The proportion of scores greater than 600 is then found by looking at the area to the right of $z = 1$ on a standard normal curve.

Verbal SAT Scores Have a Mean of 500 and a Standard