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Health insurers are beginning to offer telemedicine services online that replace the common office visit. Wellpoint Provides a video service that allows subscribers to connect with a physician online and received treatments. Wellpoint claims that users of its LiveHealth Online service saved a significant amount of money on a typical visit. The data file HTeleHealth contains the data for a sample of 20 online doctor visits. The data are consistent with the savings per visit reported by Wellpoint. Assume the population is roughly symmetric with a normal distribution.

1. UseDescriptive Statisticsin Excel'sData Analysisto get the descriptive statistics printout.
2. With 95% confidence, what is the margin of error?
3. What is the 95% confidence interval estimate of the population mean savings?
4. What is the 90% confidence interval estimate of the population mean savings?
5. What is the 88% confidence interval estimate of the population mean savings?Hint: Use Excel function=t.inv.2tto get thetvalue.

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