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2. [-/8 Points] DETAILS ASWSBE14 8.E.008. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You may need to use the appropriate appendix table or technology to answer this question. 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 $51. The population standard deviation for a one-hour session is o = $4.5. (a) What assumptions about the population should we be willing to make if a margin of error is desired? We should be willing to make the assumption that the population is at least approximately normal. We should be willing to make the assumption that the population is at least approximately skewed right. We should be willing to make the assumption that the population is at least approximately skewed left. We should be willing to make the assumption that the population is at least approximately bimodal. O We should be willing to make the assumption that the population is at least approximately uniform. (b) Using 95% confidence, what is the margin of error in dollars? (Round your answer to the nearest cent.) $ (c) Using 99% confidence, what is the margin of error in dollars? (Round your answer to the nearest cent.) $ Need Help? Read It Watch It3. [-/12 Points] DETAILS ASWSBE14 8.E.011.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You may need to use the appropriate appendix table or technology to answer this question. For a t distribution with 20 degrees of freedom, find the area, or probability, in each region. (Round your answers to three decimal places.) (a) to the right of 2.086 (b) to the left of 1.725 (c) to the left of -2.528 (d) to the right of 1.325 (e) between -2.086 and 2.086 (f) between -2.528 and 2.528 Need Help? Read It Master It