Mathematics-Data-13
A school administers a norm-referenced test to its 500 students. The average score was 50 with a standard deviation of 10. Approximately what number of students scored between 30 and 70?
A school administers a norm-referenced test to its 500 students. The average score was 50 with a standard deviation of 10. Approximately what number of students scored between 30 and 70?