Solve this by using Appendix B.1 table
Shaver Manufacturing, Inc., 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 probabilitydistribution, with a meanof $1,280 and a standard deviationof $420 per year.
a.) What fraction of the employees cost more than $1,500 per year for dental expenses?
b.) What fraction of the employees cost between $1,500 and $2,000 per year?
c.) Estimate the percent that did not have any dental expense.
d.) What was the cost for the 10 percent of employees who incurred the highest dental expense?
A Complete, Neat and Step-by-step Solution is provided in the attached file.