Homework 1
(5 points)
Chapter 1 Introduction
1.
A researcher is interested in the effects of humidity on the eating behavior of rats. A group of 25 rats is housed
in a controlled environment and the researcher measures the amount of food consumed by each
Research Methods:
Goal of Experimental method is to establish cause-and-effect.
Goal of Quasi-Experimental method is to observe influence of naturallyoccurring differences (e.g., Subject or Time variables).
Correlational Studies are one example of the Qua
Gravetter & Walnau Ch. 8
Hypothesis testing:
TYPES OF HYPOTHESES:
Scientific hypothesis = research question, phrased in
the form of a prediction.
*Research hypothesis = the hypothesis the researcher
wishes to support.
*Null hypothesis = the hypothesis tes
Gravetter & Walnau Ch. 7
Probability and samples:
sampling error = amount of error between a sample (statistic) and its
corresponding population (parameter)
distribution of sample means = collection of sample means for all
possible random samples of a par
Gravetter & Wallnau, Ch 4
Measures of Variability
Variability a quantitative measure of the degree to
which scores in a distribution are spread out or
clustered together
Range Distance between the upper real limit of the
largest value and the lower real l
Gravetter & Wallnau, Ch. 3
Measures of Central Tendency
Mean mathematical average score.
M = X
n
Median middle score(s)
Mode most frequently occurring score(s)
Frequency
Frequency
Frequency Distributions
What kinds of distributions are these?
mode
median
Gravetter & Wallnau Ch 1
Ch. 1 Introduction
Scientific Approach
Empirical observation
Accept or reject
hypothesis
Form hypothesis
Replicate
Theory: A set of structured and testable principles which guide and direct
research. Nation (1997), p. 27
(If stoma
Final Exam Review Sheet
PSY 201: Statistics
Dr. Cote-Reilly
1. A car manufacturer wants to know whether sedan and hatchback owners
differ in their preference for red, gold, blue, black, or white cars .
She collects the following data:
Color
Sedan
Type of
PSY 201 More Review for the Final Exam
1. A psychologist is investigating the hypothesis that children who grow up as the only child in the
household are more extroverted than those who grow up in larger families. A sample of children is
obtained and each
Chapter 15
Correlation and Regression
PowerPoint Lecture Slides
Essentials of Statistics for the Behavioral
Sciences
Seventh Edition
by Frederick J. Gravetter and Larry B. Wallnau
Chapter 15 Learning Outcomes
Concepts to review
Sum of squares (SS) (Chapt
Chapter 13
Introduction to Analysis of Variance
PowerPoint Lecture Slides
Essentials of Statistics for the Behavioral
Sciences
Seventh Edition
by Frederick J. Gravetter and Larry B. Wallnau
Chapter 13 Learning Outcomes
Concepts to review
Variability (Cha
Chapter 12
Estimation
PowerPoint Lecture Slides
Essentials of Statistics for the Behavioral
Sciences
Seventh Edition
by Frederick J Gravetter and Larry B. Wallnau
Chapter 12 Learning Outcomes
Concepts to review
Single-sample t statistic (Chapter 9)
Inde
Chapter 11
t-Test for Two Related Samples
PowerPoint Lecture Slides
Essentials of Statistics for the Behavioral
Sciences
Seventh Edition
by Frederick J Gravetter and Larry B. Wallnau
Chapter 11 Learning Outcomes
Concepts to review
Introduction to the t S
Chapter 9
Introduction to the t Statistic
PowerPoint Lecture Slides
Essentials of Statistics for the Behavioral
Sciences
Seventh Edition
by Frederick J Gravetter and Larry B. Wallnau
Chapter 9 Learning Outcomes
Concepts to review
Sample standard deviatio
Chapter 8 Introduction to
Hypothesis Testing
PowerPoint Lecture Slides
Essentials of Statistics for the Behavioral
Sciences
Seventh Edition
by Frederick J. Gravetter and Larry B. Wallnau
Chapter 8 Learning Outcomes
Concepts to review
z-Scores (Chapter 5)
Chapter 7
Probability and Samples
PowerPoint Lecture Slides
Essentials of Statistics for the Behavioral
Sciences
Seventh Edition
by Frederick J. Gravetter and Larry B. Wallnau
Chapter 7 Learning Outcomes
Concepts to review
Random sampling (Chapter 6)
Pr
Chapter 6
Probability
PowerPoint Lecture Slides
Essentials of Statistics for the Behavioral
Sciences
Seventh Edition
by Frederick J. Gravetter and Larry B. Wallnau
Chapter 6 Learning Outcomes
Concepts to review
Proportions (Math Review, Appendix A)
Frac
Chapter 5 z-Scores
PowerPoint Lecture Slides
Essentials of Statistics for the Behavioral
Sciences
Seventh Edition
by Frederick J. Gravetter and Larry B. Wallnau
Chapter 5 Learning Outcomes
Concepts to review
The mean (Chapter 3)
The standard deviation (
Chapter 4
Variability
PowerPoint Lecture Slides
Essentials of Statistics for the Behavioral
Sciences
Seventh Edition
by Frederick J Gravetter and Larry B. Wallnau
Chapter 4 Learning Outcomes
Concepts to review
Summation notation (Chapter 1)
Central tend
Chapter 3
Central Tendency
PowerPoint Lecture Slides
Essentials of Statistics for the Behavioral
Sciences
Seventh Edition
by Frederick J Gravetter and Larry B. Wallnau
L earning Outcomes
Concepts to review
Summation notation
Frequency distributions
3.1
Chapter 2
Frequency Distributions
PowerPoint Lecture Slides
Essentials of Statistics for the Behavioral
Sciences
Seventh Edition
by Frederick J Gravetter and Larry B. Wallnau
Chapter 2 Learning Outcomes
Concepts to review
Proportions (math review, Append
Chapter 1:
I ntroduction to Statistics
PowerPoint Lecture Slides
Essentials of Statistics for the Behavioral
Sciences
Seventh Edition
by Frederick J Gravetter and Larry B. Wallnau
Chapter 1 Learning Outcomes
M ath Skills Assessment
Statistics makes use o
Natalie Cook AP Statistics SAT Performance Analysis Project Questions to explore: 1. What is the mean SAT-Math score at this high school?
Mrs. Arkan 20 February 2008
2. How do these students SAT Math scores stack up against the rest of the state? I