Scales of measurementNominal (name things); does not scale items, rather it just labels them. Numbers are only used
in nominal scales to distinguish among objects (1= male, 2=female). Used only for c
PUREMEM
1.
2.
3.
4.
Drawing a histogram is a way of using stats to describe
the behavior of a whole sample of subjects. Calculating
a Z score is a way of describing the behavior of what?
Behavior of a
Module 4 Central Tendency
Central Tendency: numerical values referring to the center of distribution
 Mean/Average: Common Measure of CT
o X Bar
 Median
 Mode
Calculate Mean/Median/Mode in Excel:
Module 5 Variability
* Central tendency doesnt describe the central distribution
fX data base button
Range outliers give us trouble
2.75x distributions is an outlier
Range tells us variability be
Module 2 Week 1
Variables:
Variable property of an object/event that can take on different values

Continuous variables variables that can take on any value
o quantitative data; any kind of number
Module 6 Week 2 Inferential Tests
Answering the question: But is this data significant? Does it mean it will always happen this
way, or was it happenstance?
Main Tests:
Ttests 3 types
ANOVAS 2 t
What is the sampling distribution?
Element that allows us to determine how probable particular values of a test statistic
would be if in fact the null hypothesis were true
What is the alpha level?
The
What is the Sampling Distribution of the Mean?
The Sampling Distribution of the Mean is a hypothetical (imaginary) distribution
composed of an infinite number of sample means (x).
Why do we need a sam
As a body of knowledge and as an academic discipline, what
are statistics?
Statistics comprises concepts and techniques that allow researchers to move beyond
the information provided by one study and
Summarizing the data
 First you want to know the shape of the distribution (is it bell curve, multimodal, etc)
After knowing shape of distribution
 Then we attempt to say quanitatively where the cen
Two branches of statistics
1. Descriptive statistics = describe or summarize a group of numbers
2. Inferential statistics = make inference that go beyond the numbers
Variables (shortterm memories men
descriptive statistics
whenever the purpose is to describe data
inferential statistics
an important principle in statistics is variability. use statistics, which are measures on a
sample to infer valu
How many scores fall within + or  one standard error of the
mean % wise?
68%
Why is the numerator of the formula for standard deviation
squared (x^2)
That is our degrees of freedomThe mean has to b
Module 3 Displaying Data
Picture Best way to organize data for a human
Frequency Table Both Discrete Variables
Charts:
Bar charts 1 discrete v and frequency of v, or 1 discrete v and 1 continuous
301 Exam 3 Review
ANOVA: One factor; Chapter 16
ANOVA: Factorial, multiple factors with interaction effects; Chapter 17

March 18th: Intro to analysis of variance (testing multiple means and variab
PUREMEM
1.
2.
3.
4.
If psychologists want to give the representative value of
a variable based on the scores in a sample, they usually
give the mean.
If you are given the variance for a sample, you ca

Alternative Hypothesis for ftests and ANOVAAt least one group mean is different.
MS between is larger than MS within.

Null Hypothesis for ftests and ANOVA group means are equal. Little to no va
PSYC 301
QUANTITATIVE METHODS IN PSYCHOLOGY
Spring 2014, Tuesdays/Thursdays 4:005:15pm, Strickler 102
Dr. Daniel A. DeCaro
[email protected]
Department of Urban and Public Affairs, 218
Off
301 Exam 3 Review
ANOVA: One factor; Chapter 16
ANOVA: Factorial, multiple factors with interaction effects; Chapter 17

March 18th: Intro to analysis of variance (testing multiple means and variab