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    Statistics - confidence interval estimate of mean cost

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    Complaints about rising prescription drug prices caused the U.S. Congress to consider laws that would force pharmaceutical companies to offer prescription discounts to senior citizens without drug benefits. The House Government Reform Committee provided data on the prescription cost for some of the most widely used drugs (Newsweek, May 8, 2000). Assume the following data show a sample of the prescription cost in dollars for Zocor, a drug used to lower cholesterol.

    110 112 115 99 100 98 104 126

    Given a normal population, determine the 95% confidence interval estimate of the population mean cost for a prescription of Zocor.

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