A normal population has a mean of 12.2 and a standard deviation of 2.5. What proportion of the population is less than 10.0

- stapel_eliz
**Posts:**1686**Joined:**Mon Dec 08, 2008 4:22 pm-
**Contact:**

rushange wrote:A normal population has a mean of 12.2 and a standard deviation of 2.5. What proportion of the population is less than 10.0

What is the z-score for 10.0? What percentage is this?