Question

Final exam scores in a mathematics course are normally distributed with a mean of 71 and a standard deviation of 12. Fill in the missing information

Percentile: 99.87
Z-score: ?
Exam score: ?

Answer 1

See below

Explanation:

99.87-71 = 28.81 this is 28.81/12 = z-score = +2.4

corresponding to .9918 ( from z-score table) = a score of 99.18%