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Studies show that massage therapy has a variety of health benefits. A sample of 35 typical...

Studies show that massage therapy has a variety of health benefits. A sample of 35 typical one-hour massage therapy sessions showed an average charge of $60. The population standard deviation for a one-hour session is $5.42. Estimate with 91% confidence the average charge of all one-hour massage therapy sessions.

We are 91% confident that the  (Click to select)populationsample   (Click to select)standard deviationmeanproportion  charge of  (Click to select)all35 one-hour massage therapy sessions is between    and  dollars.

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Answer #1

Z for 91% confidence interval = Z0.045 = 1.7

confidence interval

                              

                              

                               = (58.443 to 61.557)

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