SOLUTION: Scores on a common final exam are normally distributed with a mean 66 and a standard deviation of 11. The department policy is to award the top 10% of scores a grade of A. The mini

Algebra ->  Probability-and-statistics -> SOLUTION: Scores on a common final exam are normally distributed with a mean 66 and a standard deviation of 11. The department policy is to award the top 10% of scores a grade of A. The mini      Log On


   

Question 929447: Scores on a common final exam are normally distributed with a mean 66 and a standard deviation of 11. The department policy is to award the top 10% of scores a grade of A. The minimum exam score to be awarded an A is about:

A 99
B 80
C 88
D 92
E 95
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
mean 66 and a standard deviation of 11
11(invNorm(.90) + 66 = x = 11(1.2816) + 66 = 80.09
About 80 the minimum exam score to be awarded an A.