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June 30, 2015

Homework Help: statistics

Posted by ali awan on Wednesday, May 8, 2013 at 3:37pm.

The National Coalition on Healthcare suggests that the mean annual premium that a health insurer charges an employer for a health plan covering a family of four averaged $12700 in 2008. A sample of 30 families of four yield a mean annual premium paid by their employer to be $13200 with a sample standard deviation of $300. We are interested in whether the mean annual premium that a health insurer charges an employer for a health plan covering a family of four is different from $12700 using a significance level of 0.10.

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