Statistics for Psychology
Chapter 9
One-Way ANOVA
ANOVA: An Introduction
What is Analysis of Variance (ANOVA)?
Does alcohol affect motor vehicle performance?
Tests for differences between means when there are more than
two groups
DV: number of driving mis
Statistics for Psychology
Chapter 7
Introduction to t-tests
Review
In chapter 5, we covered the one sample location
test with Z scores (Z test)
We approached it in several ways, the simplest of
which was to compute a test statistic that we called
the Z
Statistics for Psychology
Chapter 4
Introduction to
Hypothesis Testing
Hypothesis Testing
As researchers in psychology, when conducting
a research study, we state a hypothesis about
what we believe to be true
Ex. 1) people who own pets have lower blood
Statistics for Psychology
Chapter 3
Z Scores and Normal Curve
Overview
Think about this
Z Scores
Describes where a score fits into the overall group of
scores in comparison to the mean and standard deviation
Describes how much the score is above or below
Statistics for Psychology
Chapter 6
Making Sense of Statistical
Significance
Outline
Decision Errors
Type I & Type II
Effect Size
Statistical Power
Factors Influencing Power
2
Decision Errors
Incorrect conclusions in hypothesis
testing in relation t
Statistics for Psychology
Chapter 8
Independent sample t-tests
Comparing Means of Two Independent Samples
When do we wish to compare two
samples?
Simple experiments
e.g., experimental and control group
two separate samples of subjects
Comparing intac
Statistics for Psychology
Chapter
Measures of Central
Tendency & Variability
Central Tendency & Variability
Two reasons for discussing these topics:
1) Allows for more efficient and concise
descriptions of data than frequency distributions
can provide.