Lecture 5
The Definition and
Measurement of
Concepts
Learning Objectives
The meaning of concepts
Identify multidimensional concepts
Ecological Fallacy
Systematic error
Random error
Reliability/Validity
Concepts
An idea or mental construct that
represents
Lecture 6 - Making
Comparison & Research
Design
Chapter 3 and Chapter 4
(Essentials of PA)
Causality and Language
Goal of (social) science is establishing
causation
But, there is a disconnect between our
theories (bivariate) and the actual world
(multivar
Lecture #4
Measures of Dispersion
Quiz
1. if mean is greater than median, we can
see _ skewed distribution.
A. positive ; B. negative
2. (T or F) Mean statistics is useful for a
nominal level of measurement
3. (T or F) The number of child(ren) you
have is
Lecture#3
Central Tendency and
Dispersion
Introduction Central tendency and
Dispersion
Frequency distributions, graphs, and
charts visually display the shape of a
distribution
There are two factors that are often used
to summarize the _distribution
Measur
Lecture #2
Level of Measurement
Selecting Statistical Techniques
Based on how information (data) will be measured
and processed:
Can Variable be subdivided?
Discrete variables cannot be subdivided.
Continuous variables can be subdivided infinitely.
Levels
Lecture #7
Making Controlled
Comparison
Determining the direction of
relationships
(will come back at note #10 &phi and
Nominal measures of association
chap.7) on measure strength
lambda
Ordinal measures of association gamma
add information about the di
PLSC 251
Modern Political Analysis
Prof. Jung
Mar. 30th, 2015
Mid-term Examination [100 points]
Name: _
G#: _
Multiple Choice Part [3 point each; 45 points in total]
1. According to the Wheel of Science, research projects begin
a. with theory
b. with obse
Lectures #8
Introduction to Inferential
Statistics: Sampling and
the Sampling Distribution
To this point in the semester
Focused on how to describe the data we are
given or we collect
Central tendency
Dispersion
Focused on comparison
Bivariate cross-tabul
Lecture 1
What is a scientific
study?
Introduction
Facts and Values
What is (vs.) What ought to be
Equal distribution of wealth: is or should be?
Moon theory?
Explanatory
Correlation and Causation
Testable
Durable knowledge to apply
Wheel of Science Scien