Mathematics, 20.03.2021 02:30 adiboo2004
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): 115, 370, 250, 593, 540, 225, 177, 425, 318, 182, 275, and 228.
a. Construct a 90% confidence interval estimate for the standard deviation of family dental expenses for all employees of this corporation.
b.
Construct a 95% confidence interval estimate for the standard deviation of family dental expenses for all employees of this corporation.
c. Construct a 99% confidence interval estimate for the standard deviation of family dental expenses for all employees of this corporation
Answers: 2
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