Families USA, a monthly magazine that discusses issues related to health and health costs, surveyed
Question: Families USA, a monthly magazine that discusses issues related to health and health costs, surveyed 20 of its subscribers. It found that the annual health insurance premiums for a family with coverage through an employer averaged $10,979. The standard deviation of the sample was $1,000.
a. Based on this sample information, develop a 90 percent confidence interval for the
population mean yearly premium.
b. How large a sample is needed to find the population mean within $250 at 99 percent
confidence?
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See Solution: The solution consists of 2 pages
Type of Deliverable: Word Document![](/images/msword.png)
Type of Deliverable: Word Document
![](/images/msword.png)