Wall Street Journal reported on several studies that show massage therapy has a variety of health benefits and it is not too expensive. A sample of 12 typical one-hour massage therapy sessions showed an average charge of $58. The population standard deviation for a one-hour session is = $5.5. a. What assumptions about the population should we be willing to make if a margin of error is desired? - Select your answer - b. Using 95% confidence, what is the margin of error (to 2 decimals)? c. Using 99% confidence, what is the margin of error (to 2 decimals)? ment: C8D1A ions Exercise 08.08 Algo (Population Mean: Sigma Known) Save Wall Street Journal reported on several studies that show massage therapy has a variety of health benefits and it is not too expens one-hour massage therapy sessions showed an average charge of $58. The population standard deviation for a one-hour session is a. What assumptions about the population should we be willing to make if a margin of error is desired? - Select your answer - The population has uniform distribution The population is at least approximately normal is required The population has exponentional distribution No assumptions should be made Icon Key Exercise 08.08 Algo (Population Mean: Sigma Known) C D 94 # 0 3 2 decimals)? decimals)? G Search or type URL 60 & 7 * 8 % 5 ( 9 Save Subm 0 C