Question

In a population of normally distributed aptitude scores of 1000 academy students with mean 70 and Standard deviation 10, how many score above 95?
Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to that Z score.

Multiply that proportion by 1000. (Round to whole students.)
sda

Related Questions

A math teacher gives two different tests to measure students' aptitude for math. Scores on the first... The SAT scores of a certain population of students are approximatley normally distributed with a mea... Given that the general population is normally distributed on a standard scale measuring math aptitud...