The salaries of the employees of a corporation are normally
distributed with a mean of $25,000 and a standard deviation of
$5,000.
a.
What is the probability that a randomly selected employee will
have a starting salary of at least $31,000?
b.
What percentage of employees has salaries of less than
$12,200?
c.
What are the minimum and the maximum salaries of the middle 95%
of the employees?
d.
If sixty-eight of the employees have incomes of at least
$35,600, how many individuals are employed in the corporation?