Discuss the below:
Q: Shaver Manufacturing, offers dental insurance to its employees. A recent study by the Human Resource Director shows the annual cost per employee per year followed the normal distribution, with a mean of $1280 and a standard deviation of $420.
What fraction of the employees cost more than $1500 per year for dental expenses?
What fraction of the employees cost between $1500 and $2000 per year?
Estimate the percent that did not have any dental expense.
What was the cost for the 10 percent of employees that incurred the highest dental expense?