Statistics-Testing-Population-mean-v2

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					              Sub: Statistics                                                                                 Topic: Testing



              Question:

              To develop a 90 percent confidence interval for the population mean

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              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 withi
				
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Description: To develop a 90 percent confidence interval for the population mean Families USA, a monthly magazine that discusses issues related to health and health costs,
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