CONTINUOUS INDEPENDENT VARIBLE, CATEGORICAL DEPENDENT VARIABLE:
Logit/Probit Models for non-linear stuff
Some relationships are very non-linear and regression results wont make sense,
especially the best-fit plane.
o
Need to transform the right-skewed dis
Categorical Independent VariableContinuous Dependent Variable: Bivariate Linear
Regression Models(Y=B0 + B1X1)
ALLOW YOU TO MAKE INFERENCES ABOUT THE GENERAL POPULATION
BASED ON SAMPLES!
Making probabilistic assumptions about all residuals: Y is distribut
Multiple Regression Models: Multiple Independent variables contribute to the
explanation of a trend in the dependent variable (Y = B0 + B1X1 + B2X2.)
o
Predicted/Fitted values: for every value of X, what do you expect/predict Y to
be?
Residuals: Observed
o
Linear ModelingOrdinary Least Squares (OLS) Method (Y=A+BX)
Ordinary Least Squares: Draw a line through the data that we think
represents the underlying distribution and, at the same time accept the
presence of external noise that affects the observed v
70
60
40
20
female.l abor
80
50
60
male.l abor
80
90
In analyzing the workforce participation rates of males and females, respectively, across a
sampling of countries worldwide, interesting patterns develop that relate the amount of female
participation i
On the surface, the Economist/YouGov poll from February 18-21 indicates that, should
Mitt Romney receive the Republican Partys nomination for president, Barack Obama will defeat
him en route to re-election. Furthermore, Obama will, based on this sample, w
In the Pew Research Centers 2011 Generations Survey, 1090, or 45.23%, of the
respondents were in favor of gay marriage while 1084, or 44.98% were opposed to the idea of
gay marriage. These opinionsour expected observations across all cross-sections of the
When analyzing the potential association between female participation in the work force
and political representation of women, it is essential to analyze trends within the dependent
variablethe percentage of parliamentary seats held by women. The mean per
POLS 208: Political Science Methods
Emory University
Spring 2015
Meeting room:
Meeting time:
White Hall 205
Monday and Wednesday, 2:303:45pm
Lab sessions:
Tu: Tarbutton Hall 120A, 4:00/5:00/6:00pm
We: Tarbutton Hall 120A, 4:00/5:00/6:00pm
Th: Tarbutton Ha
Null Hypothesis (H0): Assumption about the world that there is NO RELATIONSIHP
between 2 variables.
If that is the truth, how unlikely would it be to have a data set that
clearly contradicts this hypothesis and suggests that some sort of
relationship ex
POLS208 Fall 2014
Midterm Review Sheet
What is the Scientific Method?
The dominant methodological approach in science in which findings are based on objective, systematic
observation and verified through public inspection of methods and results. There are