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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

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).

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

Construct a 97% confidence interval estimate for the average family dental expenses for all employees of this corporation.

What is the lower and upper limit?

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