20 points
Assignment #2
1. For each of the following situations, identify the measure of central tendency (mean, median, or mode) that
would provide the best description of the average score. Explain your reasoning.
a. A researcher asks each individual in
Psych 100A
Fall 2009
Introduction to Statistics
Lecture 1
Course Objectives
Basic understanding of the statistics used often in psychological research How to think analytically and critically How about research design, analysis methods and results Learn
Psychology 100A HW1 solution (2) (adapted from Kiess) Students learning the basic ballet positions often have difficulty assuming the correct foot position. One problem is foot pronation, (the foot rolling in when the heals are placed together and the toe
Ainsworth
Summer 2015
Psychology 100a: Psychological Statistics
Lecture 1:00-3:05pm TR in Franz Hall 1178
Discussion Section 1-1:50pm W in Franz Hall 1260
Information:
Email address: andrew.ainsworth@csun.edu
Office: FH 2767H (second floor tower behind th
3/7
Between groups: score= mean +effect of group + error (no person because only 1 observation per person,
cant get a sense of variation. But when 2 observations can subtract and see the difference to look for
variation)
Within groups design: score = mean
2.1 Z-scores and the Normal Distribution
What a z-score is and what is it used for? Why you divide deviation by the SD, and what the resulting unit is of the z?
Z-score is the number of SDs from the mean. We can use a z-score to calculate probability of a
Chapter 14
Analysis of Variance
Chapter 11
Learning Objectives
What procedure is used for evaluating hypotheses about means of
more than two samples?
What are pairwise and complex null hypotheses?
What are two reasons to prefer ANOVA instead of multiple t
important concepts
z-statistic vs. t-statistic
hypothesis testing with
the t-statistic
The family of t distributions
The t distribution in relation to the normal curve
Hypothesis testing with the t-statistic
Probability values from a t distribution
1
2
on
Statistical Analysis Results for Final Exam
The data for this analysis comes from a study that sought to determine whether playing violent
video games (e.g., first-person shooter games) influence aggressive behavior in younger
children. Thirty children we
Chapter 3
Learning Objectives
1.
How is a tabular frequency distribution constructed?
2.
What are class intervals and what role do they play in
the development of grouped frequency distributions?
3.
What are two graphical methods of representing
interval/
Welcome to Stats 100A
Adi Jaffe, Ph.D.
UCLA Graduate
Addiction Expert
Rehab Owner
Why am I teaching this course?
Statistics got me here
I love numbers
Im going to try to make you love them too!
Welcome to Stats 100A
Stats myths
Statistics are the worst
Th