Shaver Manufacturing, Inc., offersdental insurance to its employees. A recent st

Question

Shaver Manufacturing, Inc., offersdental insurance to its employees. A recent study by the humanresource director shows the annual cost per employee per yearfollowed the normal probability distribution, with a mean of $1,280and a standard deviation of $420 per year.

a. What fraction of the employees costmore than $1,500 per year for dental expenses?

b. What fraction of the employees costbetween $1,500 and $2,000 per year?

c. Estimate the percent that did nothave any dental expense.

d. What was the cost for the 10 percentof employees who incurred the highest dental expense?

Explanation / Answer

Parts C & D were not addressed. How do I calculate the remaining questions?

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