Incomes of Physicians an Economist Is Analyzing the Incomes of Physicians (General

question 147

Essay

Incomes of Physicians
An economist is analyzing the incomes of physicians (general practitioners,surgeons,and psychiatrists).He realizes that an important factor is the number of years of experience.However,he wants to know if there are differences among the three professional groups.He takes a random sample of 125 physicians and estimates the multiple regression model y = β₀ + β₁x₁ + β₂x₂ + β₃x₃ + ε,where y = annual income (in $1,000),x₁ = years of experience,x₂ = 1 if physician and 0 if not,and x₃ = 1 if surgeons and 0 if not.The computer output is shown below. THE REGRESSION EQUATION IS y = 71.65 + 2.07x₁ + 10.16x₂− 7.44x₃ S = 42.6 R−Sq = 30.9% ANALYSIS OF VARIANCE ​ ​
-{Incomes of Physicians Narrative} Is there enough evidence at the 10% significance level to conclude that surgeons earn less on average than psychiatrists?

---

Definitions:

Quantity Demanded

Refers to the total amount of a good or service that consumers are willing and able to purchase at a given price level in a given time period.

Interest Rate

The segment of a loan applied as interest for the borrower, customarily shown as an annual percentage of the current loan outstanding.

Net Exports

The value of a country's total exports minus the value of its total imports. It is a measure of a nation's foreign trade balance.

Net Capital Outflow

The net flow of funds used for investments in foreign assets by a country minus the flow of investment funds into the country from abroad within a specified timeframe.