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Families USA, a monthly magazine that discusses issues related to health and health costs, surveyed 21 of its subscribers. It found that the annual health insurance premiums for a family with coverage through an employer averaged $10,650. The standard deviation of the sample was $1,025.
Families USA, a monthly magazine that discusses issues related to health and health costs, surveyed 21 of its subscribers. It found that the annual health insurance premiums for a family with coverage through an employer averaged $10,650. The standard deviation of the sample was $1,025. Families USA, a monthly magazine that discusses issues related to health and health costs, surveyed 21 of its subscribers. It found that the annual health insurance premiums for a family with coverage through an employer averaged $10,650. The standard deviation of the sample was $1,025.

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A.
Based on this sample information, develop a 99% confidence interval for the population mean yearly premium. b.
How large a sample is needed to find the population mean within $235 at 90% confidence?

Submitted: 8 months ago.Category: Calculus and Above
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Tutor: GLENN GILONGOS,
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