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 reveals the following family dental expenses (in dollars).

See Attached Excel for Data.

dental expense data.xlsx

115 370 250 593 540 225 177 425 318 182 275 228

Construct a 93% confidence interval estimate for the mean of family dental expenses for all employees of this corporation.

Place your LOWER limit, in dollars rounded to 1 decimal place, in the first blank. Donotuse a dollar sign, a comma, or any other stray mark. For example, 98.4 would be a legitimate entry.___

Place your UPPER limit, in dollars rounded to 1 decimal place, in the second blank. Donotuse a dollar sign, a comma, or any other stray mark. For example, 567.8 would be a legitimate entry.___