The scores for a standardized reading test...

Question

Full problem:

-The scores for a standardized reading test are found to be normally distributed with a mean of 300 and a standardized deviation of 42. If the test is given to 500 students, how many are expected to have scores between 300 and 342?

Answer 1

Recall that P(1<Z<1) = 68.3%; your answer therefore is about 34.15%, so take that percentage of 500.