posted by nicole .
Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $36,000 and a standards deviation of $6000. What is the cutoff salary for teachers in the bottom 10%?
What is your thinking? http://davidmlane.com/hyperstat/z_table.html
ok I got b for the answer is that correct?
If it is for the bottom 10% it must be lower than the mean!
ok so it will be a?