Studies show that massage therapy has a variety of health benefits and it is not too expensive (the Wall Street Journal, March 13, 2012). A sample of 10 typical one-hour massagetherapy sessions showed an average charge of $59. The population standard deviation fora one-hour session is s = $5.50.a. What assumptions about the population should we be willing to make if a margin oferror is desired?b. Using 95% confidence, what is the margin of error?c. Using 99% confidence, what is the margin of error?

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Studies show that massage therapy has a variety of health benefits and it is not too expensive (the Wall Street Journal, March 13, 2012). A sample of 10 typical one-hour massage
therapy sessions showed an average charge of $59. The population standard deviation for
a one-hour session is s = $5.50.
a. What assumptions about the population should we be willing to make if a margin of
error is desired?
b. Using 95% confidence, what is the margin of error?
c. Using 99% confidence, what is the margin of error?

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