Question

if Jeremy is in the 90th percentile and the mean of his test scores is 180 with a standard deviation of 15, which of the following scores with Jeremy most likely get on a standardized test?
A 210
B 180
C 199
D 249

Answer 1

I think the answer is B. 180. This is because the mean of Jeremy's test score is 180 with a standard deviation of 15 which means that his test score is likely to fall within the range of 180 plus or minus 15 or from 165 - 195. Among the choices, only 180 fit in the predicted range. Note, that the standard deviation is a measure of the dispersion of the data in a data set.