Question 1
The __________ in a designed experiment to compare
k means is the probability of making at least one Type I error in a series of inferences about the population means, based on (1 -
α) 100% confidence intervals.
Question 2
A certain HMO is attempting to show the benefits of managed health care to an insurance company. The HMO 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 HMO obtained independent random samples 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 were be subjected to a one-way analysis of variance. The results of the Tukey analysis are summarized below.
Which primary specialties have significantly lower mean charges than Internal Medicine (IM)?
◦ PED, FP, and GP
◦ PED
◦ PED and FP
◦ none
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