Statistics
posted by Student .
Need help! A normal distribution with a mean of 20 and a standard deviation of 2 is evaluated to solve a business problem. What is the probability that the value in the population is between 20 and 30? What is the probability that any value in the population is between 10 and 30?
Thank you!

This is a great little stats calculator, just enter your values
http://davidmlane.com/hyperstat/z_table.html