CHAPTER 12- Introduction to analysis of variance
Analysis of variance (ANOVA): hypothesis-testing procedure that is used to evaluate mean
differences between two or more treatments (or populations)
o Uses sample data as the basis for drawing general conc
CHAPTER 11- The t Test for Two Related Samples
Dependent Sample T tests
o Fewer degrees of freedom
o Have removed lots of variability
o Reduction in variability results in increase in power
Repeated-measures design (within subject design): dependent var
Lecture 1- Chapter 12
Monday, November 7, 2016
8:50 PM
F Distribution
When to use F distribution
Working with 2 or more samples
ANOVA
Used with 1 or more nominal independent variables (with 2 levels) and an interval or ratio
dependent variable
Why n
Psych 210 Chapter 11 Homework Questions
Which of the following equations is the correct formula for calculating degrees of freedom for an
independent-samples t test?
a.
b.
c.
d.
dftotal = dfx dfy
dftotal = dfx + dfy
dftotal = dfx + X1
dftotal = X1 X2
Answ
Psych 210, Chapter 12 Homework Questions:
When we reject the null hypothesis after using an F table to determine the significance value, we can
conclude that there is:
a.
b.
c.
d.
A difference between means that is larger than we would predict by chance
N
CHAPTER 13- Repeated-measures analysis of variance
Single-factor indicates that the research study involves only one independent
variable
Independent-measures indicates the study uses a separate sample for each of the
different treatment conditions bein
PSYCHOLOGY 210 EXAM 1
Descriptive statistics: describe and summarize data
Inferential statistics: to generalize/infer from a sample about a population
o Sample: subset of population to tell us about the entire population
o Specify a #: confidence/probabil
CHAPTER 7
Probability and Samples: The Distribution of Sample Means
Z-score used to describe how any specific sample is related to all the other possible samples AND to
look up probability for obtaining certain samples
Sampling error: the natural discre
THOUGHT QUESTIONS UNIT 3
Chapter 12
1)
The goal of ANOVA is to determine whether the mean differences observed among the samples
provides enough evidence to conclude that there are mean differences among the different
populations/variables
2)
Factor is th
Application Problem #1
A study was conducted to explore whether the behavior of Beer Goggles is a result of
alcohols effect on peoples perception or just the lowering of peoples inhibitions to engage in
sexual activity. The term Beer Goggles refers to men
Chapter 12: Introduction to ANOVA
ANOVA: hypothesis testing procedure that is used to evaluate mean differences between two or
more treatments (or populations)
o Uses sample data as basis for drawing general conclusions about populations
Both ANOVA and
PSYCHOLOGY 210 EXAM 1
Descriptive statistics: describe and summarize data
Inferential statistics: to generalize/infer from a sample about a population
o Sample: subset of population to tell us about the entire population
o Specify a #: confidence/probabil
Psych Stats 210 Exam 3 Study Guide
1. What is the main purpose of Analysis of Variance?
The main goal of ANOVA is to determine whether the mean differences (uses
variance ) observed among the samples provide enough evidence to conclude that
there are mean
Psych 210 Stats Vocabulary- Exam 1
CHAPTER 1
o Statistics: set of mathematical procedures for organizing, summarizing, and interpreting
information
o Population: the set of all the individuals of interest in a particular study
o Sample: a set of individua
1. A 1 x 4 repeated measures ANOVA was conducted to evaluate changes in the evaluation of
emotions on different segments of the face shown in a photograph. Each photograph of models
presented to subjects was evaluated on a 7-point scale reflecting the amo
Reading - Chapter 12 (Part 1)
Monday, November 7, 2016
8:20 PM
Using the F Distributions with 3 or more samples
3 group comparison is slightly more complicated than a 2 group comparison
Requires comparison distributions that can accommodate the complex