A monthly magazine that discusses issues related to health and health costs surveyed Show more Families USA a monthly magazine that discusses issues related to health and health costs surveyed 19 of its subscribers.
A monthly magazine that discusses issues related to health and health costs surveyed Show more Families USA a monthly magazine that discusses issues related to health and health costs surveyed 19 of its subscribers.
It found that the annual health insurance premiums for a family with coverage through an employer averaged $10230. The standard deviation of the sample was $1060. (a) Based on this sample information develop a 95% confidence interval for the population mean yearly premium. (Round up your answers to the next whole number.) Confidence interval for the population mean yearly premium is between $ and $ . (b) How large a sample is needed to find the population mean within $278 at 95% confidence? (Round up your answer to the next whole number.) Sample size Show less
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