A Certain HMO Is Attempting to Show the Benefits of Managed

question 28

Multiple Choice

A certain HMO is attempting to show the benefits of managed care to an insurance company. The HMObelieves that certain types of doctors are more cost-effective than others. One theory is that Certification Levelis an important factor in measuring the cost-effectiveness of physicians. To investigate this, the HMO obtainedindependent random samples of 19 physicians from each of the three certification levels-- Board certified (C) ;Uncertified, board eligible (E) ; and Uncertified, board ineligible (I) -- and recorded the total per-member,per-month charges for each (a total of 19 physicians) . In order to compare the mean charges for the threegroups, the data will be subjected to an analysis of variance.Write the null hypothesis tested by the ANOVA.

• A) \(\mathrm { H } _ { 0 } : \mu _ { \mathrm { C } } = \mu _ { \mathrm { E } } = \mu _ { \mathrm { I } }\)
• B) \(\mathrm { H } _ { 0 } : \beta _ { 1 } = \beta _ { 2 } = \beta _ { 3 } = 0\)
• C) \(\mathrm { H } _ { 0 } : \mu _ { \mathrm { C } } = \mu _ { \mathrm { E } } = \mu _ { \mathrm { I } } = 0\)
• D) \(\mathrm { H } _ { 0 } : \mathrm { p } _ { 1 } = \mathrm { p } _ { 2 } = \mathrm { p } _ { 3 }\)

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Definitions:

Variable Capacitance Sensors

Sensors that detect changes in capacitance, which can be used to measure various parameters, such as pressure, position, or acceleration.

Potentiometers

Potentiometers are variable resistors used to measure the electrical potential (voltage), often found in devices for adjusting volume or tuning.

One-speed Fallback

A safety feature in some electrical or mechanical systems that allows operation at a safe, reduced speed in case of some failures.

Auxiliary Section

A supplementary part of a device, machine, or system serving an additional or secondary function.