A Certain HMO Is Attempting to Show the Benefits of Managed

question 55

Multiple Choice

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 both primary specialty and whether the physician is a foreign or USA medical school graduate are an important factors in measuring the cost-effectiveness of physicians. To investigate this, the president obtained independent random samples of $40 \mathrm { HMO }$ physicians, half foreign graduates and half USA graduates, 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. Thus, information on charges were obtained for a total of $n = 160$ doctors. The ANOVA results are summarized in the following table.
$\begin{array} { l r r r r r } \text { Source } & \text { df } & \text { SS } & \text { MS } & \text { F Value } & \text { Prob > F } \\\hline \text { Specialty } & 3 & 22855 & 7618 & 60.94 & .0001 \\\text { Medschool } & 1 & 105 & 105 & 0.84 & .6744 \\\text { Interaction } & 3 & 890 & 297 & 2.38 & .1348 \\\text { Error } & 152 & 18950 & 125 & & \\\hline \text { Total } & 159 & 42800 & & & \\\hline\end{array}$

Interpret the test for interaction shown in the ANOVA table. Use $\alpha = 0.025$ .

• A) There is sufficient evidence at the \(\alpha = 0.025\) level to say that primary specialty and medical school do not interact.
• B) There is insufficient evidence at the \(\alpha = 0.025\) level to say that primary specialty and medical school interact.
• C) There is sufficient evidence at the \(\alpha = 0.025\) level to say that primary specialty and medical school interact.
• D) It is impossible to make conclusions about primary specialty and medical school interaction based on the given information.

Understand the implications and consequences of legislation and policies during the 1920s.

Recognize key figures and events that shaped the social and political landscape.

Analyze the impact of technological advancements and media on society.

Discuss the causes and effects of population movements and immigration trends.

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Definitions:

Stamen

The stamen is the male reproductive part of a flower composed of the anther and filament, responsible for producing pollen.

Volatile Chemicals

Substances that easily vaporize at normal temperatures and pressures, often having strong odors.

Herbivory

The act of eating plants or plant parts by animals, which can significantly influence plant population and community structure.

Parasitize

To live as a parasite in or on another organism, deriving nutrients at the host's expense without offering any beneficial return.