Intro to Analysis of
Variance (ANOVA)
HW 5 Due Monday, 5/16
There are 2 versions that will be available on the
Canvas site
These Teams Do Version A:
French Toast Mafia, ParaNormal Distribution 2,
Triple Threat, Standard Deviants, ParaNormal
Distribution
Review of Z tests
Outline
Brief review of key ideas
Another hypothesis testing example problem
Reminder about HW2 which is due on
Wednesday, 1/30
Notes for team exercise
Review of Key Ideas
Can use z scores to calculate frequency of scores
above, below, o
Homework 2: Version A
New Balance, a major athletic-wear company, is dissatisfied with the number of
employee days lost due to sickness. Per employee, the mean number of days lost per year
is 21, and the standard deviation is 5. In order to try to reduce
Homework 4: Version 1
A developmental psychologist wants to know whether playing violent computer games
makes elementary school children behave more aggressively. A random sample of twelve
6-10 year olds are observed for 30 minutes playing in the school p
Team #_
Name_
Homework 3: Version A
Southern Illinois University is concerned that the number of female students who take
technology-oriented classes. On average, each class has a female enrollment of 12, with
a standard deviation of 5 (each class has a l
Psychology 201
HW5 Version A
Name: _
A researcher is interested in determining the effectiveness of two drugs designed to
reduce the number of tics among participants with Tourettes syndrome. She randomly
assigns participants to one of three conditions an
Homework 6: Version 1
You are a psychologist interested in whether white peoples scores on a well-established
racial prejudice attitude scale correlates with their friendliness towards an AfricanAmerican experimenter. You obtain a sample of 15 Caucasian-A
= 100, 2 = 225, = 15
Key formula:
Question 1:
You first needed to take the square root of the variance to get the standard deviation. To
figure out the proportion of scores falling below a certain level, we would take a Z score,
and use the Z table to fi
Homework 2: Version A
New Balance, a major athletic-wear company, is dissatisfied with the number of
employee days lost due to sickness. Per employee, the mean number of days lost per year
is 21, and the standard deviation is 5. In order to try to reduce
Psychology 201
Correlation and Causation Media Report
DUE TUESDAY, MAY 31 BY 5:00 PM VIA CANVAS (SUBMIT VIA
ASSIGNMENTS LINK)
Goal: Demonstrate your understanding of the difference between data that support a
causal conclusion and data that only support a
Name _ Team # _
Homework 4: Version 1
A developmental psychologist wants to know whether playing violent computer games
makes elementary school children behave more aggressively. A random sample of twelve
6-10 year olds are observed for 30 minutes playing
Name _ Team # _
Homework 6: Version 1
You are a psychologist interested in whether white peoples scores on a well-established
racial prejudice attitude scale correlates with their friendliness towards an AfricanAmerican experimenter. You obtain a sample o
The Rank Sum Test and Dependent
Samples T-Tests
+
Outline
Rank-Sum Test
The nonparametric equivalent of the independent t
Dependent Samples t-test
The Rank-Sum Statistic, (T)
Nonparametric procedure used when you wish to compare
two samples on ordinal
The single sample
t-test
Outline
Intro to t-test and t distributions
T-tests for one sample
Effect size with t
CI with t
Class exercise
Where we have been
We have been focusing on procedures that
permit researchers to test hypotheses about a
population
So
Post Hoc Analysis in
ANOVA and Introduction
to Factorial Design
Outline
More About Following Up on a Significant F
Review of the Protected t
The Tukey Test
Factorial Designs and ANOVA
Main
Effects and Interactions
Following Up on a Significant F
F tells
Power
Outline
Brief Review
What is power and how is it useful?
Major components of a power analysis
Examples and exercise
Parameter estimation and Confidence Intervals
Possible outcomes of an
experiment
Actual but unknown state of nature
Decision
H0 true
Sampling Distributions,
Logic of Hypothesis Testing,
& Introduction to Z
Tests
Outline
Quick review
Probability
The Distribution of Sample Means
Standard
Error
Testing Hypotheses
Four
steps
Review
How to calculate proportion of a distribution
above a sp
Psychological
Statistics
Fundamental Issues
Outline
Why Statistics?
Some Fundamental Issues
Characterizing a Sample
Descriptive vs. Inferential Techniques
Populations and Samples
Variability
Scales of Measurement
Frequency Distributions
Shape, Central Ten
Review of t tests for
Team Task 5
Review
Independent measures vs. dependent
measures
Within
subjects and matching
When would you use one vs. the other?
Independent t
Whats the same?
Still
uses basic logic of 1 sample t
Still use CV from t-table determi
Using Z Scores
Outline
Quick Review:
Normal
Distributions
The Empirical Rule
Z-Scores (Standard Scores)
Computing z-scores
Computing raw scores from z-scores
Using the Normal Distribution
Determining
relative frequencies given scores
Determining th
Independent Samples
T-Tests
Reminder: HW 4 Due Monday,
5/9
There are 2 versions that will be available on the
Canvas site
These Teams Do Version 1:
French
Toast Mafia, ParaNormal Distribution 2, Triple
Threat, Standard Deviants, ParaNormal Distribution 5
The Chi-Square (2) Statistic
Analyses with Nominal Data
Nominal Data
Data in which numbers are used to categorize
the observations
Aka categorical or enumerative data
Describe nominal data in terms of how man
y rather than how much
Frequency distribut
Correlation and
Regression
HW 6 Due Wednesday, 5/25; Media
Report due Tuesday, 5/31 (5:00 PM)
For the HW, there are 2 versions that can be found
on the Canvas site under Assignments
These Teams Do Version 1:
French Toast Mafia, ParaNormal Distribution 2,
ANOVA Review &
the Protected t-test
Another ANOVA example
Imagine that you want to compare three groups of
children 5 children per group. Each group plays a
different video game and then is observed in a structured
lab task for the number of aggressive ac
Variability, Z Scores,
and Normal
Distributions
Outline
Quick Review
Some Fundamental Issues
Characterizing a Sample
Shape, Central Tendency, Variability
Measures of Central Tendency and Variability
Normal Distributions
Descriptive vs. Inferential Techniq
Homework for Friday, 4/8
HW #1 version A Teams: French Toast Mafia, ParaNormal Distribution 2, Triple Threat,
Standard Deviants, ParaNormal Distribution 5, Sum Squares, The Bayesian Conspiracy
1. IQ scores are standardized such that the population of s
Team #_
Name_
Homework 3: Version A
Southern Illinois University is concerned that the number of female students who take
technology-oriented classes. On average, each class has a female enrollment of 12, with
a standard deviation of 5 (each class has a l
Alex Probst
Statistical Methods in Psychology
May 31, 2016
Correlation Causation Media Report
Article on baby powder and cancer: Lawsuits Over Baby Powder Raise Questions About
Cancer Risk reported by Roni Caryn Rabin in The New York Times (May 23, 2016)
Chapter 8: Logic of Hypothesis Testing 6 steps: o Assumptions: Population assumptions: o Hypotheses: H0 : mu = mu0 Where mu0 is a specific value Alternative hypotheses available: H1 : mu =/= mu0 H1: mu > mu0 H1: mu < mu0 The population is normally distrib