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Question

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 $\$ 59$. The population standard deviation for a one-hour session is $\sigma=\$ 5.50$.

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

Solution

VerifiedAnswered 10 months ago

Answered 10 months ago

Step 1

1 of 6We have given:

- the standard deviation of $\sigma =5.5$,
- the sample size of $n=10$.

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

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