Question

The National SAT score average is 1019. If we assume SAT scores are normally distributed with standard deviation = 90, what is the mean SAT score for 100 students at the 90th percentile?

Answer 1

\[\Large X = \mu + Z \sigma \]\[\Large \mu = 1019\]\[\Large \sigma = 90\]Z score for the 90th percentile from the table = 1.282. Plug in and calculate X.