SOLUTION: If 1000 students take a test that has a mean of 40 minutes, a standard deviation of 8 minutes, and is normally distributed, how many would you expect would finish in between 24&48

Algebra ->  Probability-and-statistics -> SOLUTION: If 1000 students take a test that has a mean of 40 minutes, a standard deviation of 8 minutes, and is normally distributed, how many would you expect would finish in between 24&48       Log On


   

Question 874731: If 1000 students take a test that has a mean of 40 minutes, a standard deviation of 8 minutes, and is normally distributed, how many would you expect would finish in between 24&48 minutes?
A.250
B.500
C.750
D.820
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
P(z = 1) - P(z = -2) = .84 -.02 = .82 .82%2A1000%29 = 820 of them