2. Studies show that massage therapy has a variety of health benefits and it is not too expensive. 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 iso = $5.50. I3 marks]

What assumptions about the population should we be willing to make if a margin of error is desired?

Using 95% confidence, what is the margin of error and confidence interval?

Using 99% confidence, what is the margin of error and confidence interval?