A physician and president of a Tampa Health Maintenance Organization (HMO) is at

Question

A physician and president of a Tampa Health Maintenance Organization (HMO) is attempting to show the benefits of managed health care to an insurance company. The physician believes that certain types of doctors are more cost=effective than others. One theory is that Primary Specialty is an important factor in measuring the cost-effectiveness of physicians. To investigate this, the president obtained independent random sample of 20 HMO physicians from each of four primary specialties - General Practice (GP), Internal Medicine (IM), Pediatrics (PED, and Family Physician (FP) and recorded the total per member per month charges for each. In order to compare the mean charges for the four specialty groups, the data will be subjected to a one-way ANOVA. The results of the Bonferroni analysis is summarized below

Group            PED        FP    GP        IM
Sample Mean 25.3     30.6    41.4      55.9

Which primary specialties have significantly lower mean charges than Internal Medicine (IM)?

Explanation / Answer

The results of the Bonferroni analysis is summarized below Group PED FP GP IM Sample Mean 25.3 30.6 41.4 55.9 We rank the sample means and place a bar over any treatment pair whose sample means differ by less than a constant (Bij) Any pair of means not connected by an over-bar implies a difference in corresponding population means But the over-bar is not visible in the question details So please follow the above steps to come to the conclusion as to whcih pair of means are significantly different Hope this helps!

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