Essay
(A) Construct a 90% confidence interval estimate of the mean family dental expenses for all employees of this corporation.
(B) What assumption about the population distribution must be made to answer (A)?
(C) Interpret the 90% confidence interval constructed in (A).
(D) Suppose you used a 95% confidence interval in (A). What would be your answer?
(E) Suppose the fourth value were 593 instead of 93. What would be your answer to (A)? What effect does this change have on the confidence interval?
(F) Construct a 90% confidence interval estimate for the standard deviation of family dental expenses for all employees of this corporation.
(G) Interpret the 90% confidence interval constructed in (E).
Correct Answer:
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(A) 
(B) The population of dental expens...View Answer
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Correct Answer:
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(B) The population of dental expens...View Answer
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