Name: _ Date: _
1. What are the consequences of failing to meet the assumptions of a parametric test when
performing research?
A) If we fail to meet the assumptions of a parametric test, then we will
Name: _ Date: _
1. The critical cutoffs for a two-tailed, paired-samples t test with seven participants at a p
level of 0.01 are:
A) 2.447 and 2.447.
B) 3.143 and 3.143.
C) 3.708 and 3.708.
D) 2.998 a
Page 1 of 11
Fall 2011
Homework 4
Student Name:
_
Student ID#: _
1. In an independent t test, S1 = 10, and S2=20, then what is Spooled?
A) 20
B) Cannot determine
C) 15
D) 225
E) 10
2. In an independen
categories
categories
ordered
6. Provide an example of an interval level measure in psychology.
8. A frequency distribu on expressed as a histogram, has _ on the xaxis and _ on the Y-axis?
10. Floor
o What is the variance? 23.94 (see table for calculation)
38 7.05 49.70
Sum = 619. Sum = 0, Sum = 454.95.
Mean = 30.95 (Deviations always sum to 0.) Var = 454.95/(20-1) = 23.94.
Probability and the
Normal Distribution
320
Ainsworth
Probability
Part of everyday life
probability in poker
probability in lottery
probability of rain
Guides our expectations
Lies at the heart of sta
Introduction to
Statistics
100a
Ainsworth
1
What is Statistics?
Statistics refers to the methods or
procedures used to:
Organize/Summarize
data
data
Draw inferences (extract meaning) from data
Anal
100A Psychology Statistics
Week 8, Wednesday, Nov. 26
Important ANOVA
Important ANOVA
The Fundamental Partitioning
= +
( )2
( )2
( )2
The Fundamental Partitioning
Total: The difference between each
100A Psychology Statistics
Week 7, Wednesday, No. 19
Dependent Samples t-test
In this study there are two groups of athletes, one is blood
doped, and another who is not. However, on a case-by-case
bas
Psychological Statistics, 100A
Week 10, Monday, Dec. 8th
Non-Parametric Tests
Parametric tests like the Z-test, t-test, and F-test in ANOVA make strong
assumptions about the data in order for the stat
2.
9, 33, 34, 34, 36, 33, 36, 24, 30, 29
x
34
x
33
x
30.95
x
38
x
nd
16
25.86
x
27.5
x
34
x
x
34
6.5
3.25
x
23.94
619.
30.95
x
( )
8.95
7.95
7.95
6.95
3.95
1.95
1.95
.95
.05
2.05
2.05
2.05
3.05
3.05
Ainsworth
Summer 2017
Psychology 100a: Psychological Statistics
Lecture 1:00-3:05pm TR in Franz Hall 1260
Discussion Section 1-1:50pm W in Franz Hall 1260
Information:
Email address: [email protected]
Categorical vs. continuous variables
Categorical variable the responses do not fall into number line, it falls into groups
(not appropriate for measuring means)
Continuous variable responses approxima
Assignment! Due on Oct. 16th
Grade the last attempt (try as many times as possible)
Distribution-the frequency of different variable
Frequency-how often something occurs
The normal distributionCenter:
Comparing distribution
- Identify systematic relationships or linkages between two or more
variables
Crosstab table
- Display frequency distributions for two or more groups in a single table
- Useful
100 A Midterm Practice
_Z_X
Median: The score on X at the 50th percentile, or the score that divides the sample in half
Mean: The mathematical average,X
Mode: The most frequently observed score in a d
(n1 1)s12 +(n2 1)s22
s =
n1 + n2 2
2
p
2
2
(
n
1)
s
+
(
n
1)
s
1
2
2
s2p = 1
n1 + n2 2
s2p =
(151)108.21+(101)64.0
15+10 2
s2p = 90.914
sM X M X =
1
2
sM
s2p
n1
X1 M X 2
+
=
s2p
n2
90.914 90.914
+
15
T tests Single Sample Dependent Groups Independent Groups
H0: f S [J
Directional
Hypothesis
Non
directional
Hypothesis
Degrees of df = N-l, N is the single
Freedom sam - les size
Formula
SS1
100 A Midterm Practice
Dene the terms:
Mean:
Median:
Mode:
1. Dene the two indices of sample variability and show equations.
2. By denition, the sum of deviations from the mean =?
3.Why is the varianc
7/9/16
Midterm Review Session
7/6/16
Practice Midterm: Question 33
33. What is a repeated-measures design
(sometimes called pre-test post-test design)?
- The same people are in both groups
Depend
Psych 100A: Statistics Sample Variance
X M 2
2 Z( i_ X)
S :
Nl
Memorize for
Exam Greek Pogulaon Parameters
[1: Population Mean
0: Population Standard Deviation
a: Signicance Level
X: Subscript: of
2
Psychological Statistics 100A
Week 9, Dec. 1st
Review: ANOVA Example
A psychologist was interested in whether different TV shows
lead to a more positive outlook on life. People were split into
4 group
100A Psychology Statistics
Week 10, Wed. Dec. 10
Non-Parametric Tests
From: http:/www.okstate.edu/ag/agedcm4h/academic/aged5980a/5980/newpage28.htm
The "t" test and the F test described previously are
100A Psychology Statistics
Week 8, Monday, Nov. 24
ANALYSIS OF VARIANCE (ANOVA)
It is called analysis of variance for a reason. That
being, ANOVA tests three or more group mean
differences by comparin
100A Psychological Statistics
MW 2:00 3:15 Fowler
A103B
Steven P. Reise, Ph.D.
F 2:00 2:50 Fowler A103B
Day 1 Oct. 6, 2014
Office
Steven P. Reise, Ph.D.
Franz Hall 3587
[email protected]
office hou
Form B
Name_
Student ID_
Exam 1
1. A _ is a situation in which a constraint prevents a variable from taking on values
below a certain point.
a) positive skew
b) negative skew
c) floor effect
d) ceilin
Reading Strategies for Journal Articles
Pursuing a degree in psychology means that you will read many research studies, often in the
form of academic journal articles. Journal articles are usually den
100A Discussion
10/28/11
Week 5
MINI QUIZ
1. Define: power, alpha, effect size
2. What is the difference between effect size, effect
size in standard deviations, and effect size in
standard error?
3.