Cost of Massage Therapy Sessions. The 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 10 typical one-hour massage therapy sessions showed an average charge of $59\$ 59. The population standard deviation for a one-hour session is σ=$5.50\sigma=\$ 5.50.

b. Using 95%95 \% confidence, what is the margin of error?


Answered 10 months ago
Answered 10 months ago
Step 1
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We have given:

  • the standard deviation of σ=5.5\sigma =5.5,
  • the sample size of n=10n=10.

Our task will be to find the margin of error which provides the (1α)=95%(1-\alpha)=95\% confidence interval.

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