Question

Scores on an exam are normally distributed with a mean of 76 and a standard deviation of 10. In a group of 230 tests, how many students score below 66?

about 115 students
about 78 students
about 93 students
about 37 students

Answer 1

50% - 34% = 16%. So 16% or 0.16 percent of students got a grade lower than 66. Given that you have 230 students: 230 * .16 = 37

Answer 2

so about 37 percent?

Answer 3

D. About 37 Students :)

Answer 4

alright thanks :)

Answer 5

Your Welcome