Question

Please HELP.. MEDAL/ FAN
The ages of students in a school are normally distributed with a mean of 15 years and a standard deviation of 2 years. Approximately what percent of the students are between 14 and 18 years old?
24.17%
62.47%
30.85%
93.32%

Answer 1

@imer

Answer 2

Use this formula to convert the normal distribution to standard normal distribution, \[z=\frac{ x- \mu }{ \sigma }\]where \[\mu=mean\]\[\sigma=deviation\]

Answer 3

What? @xiphoidx can u do this?

Answer 4

im trying to get ^ helped! (: