Scores on the verbal section of the SAT have a mean of 500 and a standard deviation of 100. If someone scored at the 90th percentile, what is their SAT score?

Answer 1

Can someone show me how to find this equation to this problem?

Scores on the verbal section of the SAT have a mean of 500 and a standard deviation of 100. If someone scored at the 90th percentile, what is their SAT score?

Answer 2

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the Z score related to that proportion.

Z = (score-mean)/SD

Insert the values and solve for the score.