Merrill Lynch Securities and Health Care Retirement Inc. are two large employers in downtown Toledo, Ohio. They are considering jointly offering child care for their employees. As a part of the...

Merrill Lynch Securities and Health Care Retirement Inc. are two large employers in downtown Toledo, Ohio. They are considering jointly offering child care for their employees. As a part of the feasibility study, they wish to estimate the mean weekly child-care cost of their employees. A sample of 10 employees who use child care reveals the following amounts spent last week:

   $107      $92      $97       $95      $105       $101       $91       $99       $95     $104

Let these values represent a random sample drawn from a normally distributed population. Find a
90%
confidence interval for the mean weekly child-care cost (you don’t have to show your calculations of the necessary
sample statistics
– use a device for that -- but give their values).

Do show

your calculation the margin of error and CI. (12)