Question
Suppose the scores of students on an exam are normally distributed with a mean of 393 and a standard deviation of 57. According to the empirical rule, what percentage of students scored between 279 and 507 on the exam
Answers
Reiny
Don't know what the "empirical rule" is, but in real normal distribution calculations, I got
95.45%
http://davidmlane.com/normal.html
95.45%
http://davidmlane.com/normal.html