Question

The personnel department of a large corporation wants to estimate the family dental expenses of its employees to determine the feasibility of providing a dental insurance plan. A random sample of 12 employees in 2004 reveals the following family dental expenses (in dollars): 115, 370, 250, 93, 540, 225, 177, 425, 318, 182, 275, and 228. The sample mean is

Answer 1

The answer is "266.5".

Explanation:

Given value:

`115, 370, 250, 93, 540, 225, 177, 425, 318, 182, 275, and\ 228.`

find:

Sample mean=?

`=\frac{\text{total dental expenses}}{number \ of \ employees}`

`=(115+370+250+93+540+ 225+ 177+ 425+ 318+ 182+ 275+228)/(12)\\\\=(3,198)/(12)\\\\=266.5\\\\`