SOLUTION: A Large group of students took a test in Math and the final grades have a mean of 75 and a standard deviation of 8. If we can approximate the distribution of these grades by a norm

Algebra ->  Probability-and-statistics -> SOLUTION: A Large group of students took a test in Math and the final grades have a mean of 75 and a standard deviation of 8. If we can approximate the distribution of these grades by a norm      Log On


   

Question 1006219: A Large group of students took a test in Math and the final grades have a mean of 75 and a standard deviation of 8. If we can approximate the distribution of these grades by a normal distribution. What percentage of the students
(a) should pass the test (grades >= 60)

Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
z=(x-mean)/sd
(60-75)/8
= -1.875
Want the probability z>= -1.875
It is 0.9696