Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $37,000 and a standard deviation of $5000. What is the cutoff salary for teachers in the bottom 10%?
A)$30,600
B)$43,400
C)$28,775
D)$45,225

Question

Quizplus · Accepted Answer

The cutoff salary for the bottom 10% can be found using the z-score for 10%, which is approximately -1.28. Using the formula: cutoff = mean + (z-score * standard deviation), we get $37,000 + (-1.28 * $5,000) = $30,600.

Assume That the Salaries of Elementary School Teachers in the United