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100 Int'l Conflict 90 No Int'l Conflict 80 70 60 50 40 30 20 10 10 15 20 25 Unemployment Rate Approval Rating

100 Int'l Conflict 90 No Int'l Conflict 80 70 60 50 40 30 20 10 10 15 20 25 Unemployment Rate Approval Rating

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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100 Int'l Conflict No Int'l Conflict 90 80 70 60 50 40 30 20 10 5 10 15 20 25 Unemployment Rate Approval Rating
Transcribed Image Text:100 Int'l Conflict No Int'l Conflict 90 80 70 60 50 40 30 20 10 5 10 15 20 25 Unemployment Rate Approval Rating
3. A researcher is studying the effect of a civic engagement program on 11 college campuses. The researcher is mainly interested in the program's effect (the independent variable) but wants to control for campus differences using some dummy variables. How many dummy variables does the research need to incorporate into the multiple regression analysis? (fill in the blank). Explain your answer: 4. A political scientist uses multiple regression analysis to study how a leader's approval rating is affected by international conflict (coded o or 1) and domestic unemployment rate. The analysis yields the following regression equation: Approval rating = 60.892 - 2.273 Unemployment + 12.611· Int'l conflict A. Based on this regression equation, what approval rating is expected in a country that is involved an international conflict and has a 15% unemployment rate?5 B. Based on this regression equation, what approval rating is expected in a country with a 10% unemployment rate that is not in an international conflict? C. Based on this regression equation, what's the effect of a 1 percentage point increase in the unemployment rate on a leader's approval rating? D. Carefully draw two regression lines on the chart below. Draw a dotted line to represent the expected relationship between unemployment and approval rates in countries involved in international conflicts. Draw a solid line to represent that relationship in countries that are not involved in international conflicts and a dashed/dotted line for countries involved in international conflicts. Use a ruler or straight edge to draw straight lines.
Transcribed Image Text:3. A researcher is studying the effect of a civic engagement program on 11 college campuses. The researcher is mainly interested in the program's effect (the independent variable) but wants to control for campus differences using some dummy variables. How many dummy variables does the research need to incorporate into the multiple regression analysis? (fill in the blank). Explain your answer: 4. A political scientist uses multiple regression analysis to study how a leader's approval rating is affected by international conflict (coded o or 1) and domestic unemployment rate. The analysis yields the following regression equation: Approval rating = 60.892 - 2.273 Unemployment + 12.611· Int'l conflict A. Based on this regression equation, what approval rating is expected in a country that is involved an international conflict and has a 15% unemployment rate?5 B. Based on this regression equation, what approval rating is expected in a country with a 10% unemployment rate that is not in an international conflict? C. Based on this regression equation, what's the effect of a 1 percentage point increase in the unemployment rate on a leader's approval rating? D. Carefully draw two regression lines on the chart below. Draw a dotted line to represent the expected relationship between unemployment and approval rates in countries involved in international conflicts. Draw a solid line to represent that relationship in countries that are not involved in international conflicts and a dashed/dotted line for countries involved in international conflicts. Use a ruler or straight edge to draw straight lines.
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