Oran Ben-Simon
APSY 210 Statistical Methods in Psychology
1_1
Homework
RAW DATA
Dr. X is an exopsychologist, a psychologist who studies alien life forms. She is studying
the dominant life form on the planet Gizmat, called zorks. Zorks have a rather compli
Teresa Choudhury
4/28/14
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Chapter 13
-Chi-square tests- hypothesis testing procedures used when the variables of interest are nominal
variables.
-Chi-square test for goodness of fit- hypothesis-testing procedure that examines how well an
ob
Teresa Choudhury
Chapter 11
-Correlation- association between scores on two variables.
-Graphing correlations
-Scatter diagram- graph showing the relationship between two variables: the values f one
variable are along the horizontal axis and the values of
Teresa Choudhury
Chapter 12
-Predictor variable (usually x)- in prediction, variable that is used to predict scores of individuals
on another variable.
-Criterion variable (usually y)- in prediction, a variable that is predicted.
-Linear prediction rule-
Teresa Choudhury
3/24/14
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Chapter 8
The t test for independent means- hypothesis testing procedure in which there are two separate
groups of people tested and in which the population variance is no known.
The distribution of difference betw
CHAPTER ONE:
descriptive statistics- procedures for summarizing a group of scores or otherwise making them more
understandable.
Psychologists use descriptive statistics to summarize and describe a group of numbers from a
research study.
inferential statis
Teresa Choudhury
3/13/14
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Chapter 7
t test- hypothesis-testing procedure in which the population variance is unknown. It compares t
scores from sample to a comparison distribution called a t distribution
The t test for a single sample- hypo
Teresa Choudhury
4/7/14
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Chapter 10
Factorial analysis of variance- analysis of variance for a factorial research design.
Factorial research design- a way of organizing a study in which the effects of two or more
variables are studied at on
Teresa Choudhury
2/26/14
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Chapter 6
Decision errors- Situations in which the right procedures lead to the wrong decisions. Decision
errors are rarely mentioned in research articles.
Type 1 error- Deciding that the null hypothesis is false w
Teresa Choudhury
4/28/14
Blackboard post
Chapter 13
-Chi-square tests- hypothesis testing procedures used when the variables of interest are nominal
variables.
-Chi-square test for goodness of fit- hypothesis-testing procedure that examines how well an
ob
Example
Model Summary
Model
R
R Square
.342a
Std. Error of the
Square
1
Adjusted R
Estimate
.117
.101
1.1484
a. Predictors: (Constant), Work
Coefficientsa
Model
Unstandardized Coefficients
Standardized
t
Sig.
Coefficients
B
1
Std. Error
(Constant)
7.642
.
Teresa Choudhury
2/4/14
Statistical Methods of Psychology
Project 1
The variables of these studies is how many days a week a person drinks caffeinated
beverages (A) and how many cups a day they drink them (B). The variable for both is
quantitative with eq
Teresa Choudhury
2/14/14
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Chapter 4
This chapter is all about introducing us to hypothesis testing. A hypothesis is a prediction
intended to be tested in a research study. Hypothesis testing is a procedure for deciding
whether the outcome o
Teresa Choudhury
Project 4
Part 1:
a)
In part one the research hypothesis is that the number of emails someone sends and the
number of siblings someone has are related. The null hypothesis is that the number of emails
someone sends and the number of sibli
Teresa Choudhury
2/12/14
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Chapter 3
Chapter 3 has some of the key ingredients for inferential statistics. Two things that we
have learned about but will learn more about this chapter is a z score and a normal curve. A z
score is describes h
Teresa Choudhury
4/9/14
Statistics Methods of Psychology
Project 3
Part 1
The hypothesis for part one is our class gets more sleep on average than the previous
class, which can be interpreted as M1 > M2. The null hypothesis our class gets the same
amount
Teresa Choudhury
Project 2
In this research study the research hypothesis is The students in Professor Laytons class
sleep a different amount than the general student population. The null hypothesis is The
students in Professor Laytons class sleep the sam
Chloe Ng
05/5/14
Project #4
Part I
A.) The research hypothesis (HA) for this bivariate correlation is that the number of emails
sent and the number of siblings an individual has are related (r0). The null hypothesis
(Ho) is that the number of emails sent
Coefficientsa
Model
Unstandardized Coefficients
Standardized
t
Sig.
Coefficients
B
1
Std. Error
Beta
(Constant)
7.642
.184
Work
-.039
41.529
.014
-.342
.000
-2.748
.008
a. Dependent Variable: Sleep
Part c
Model Summary
Model
R
.350
a
Adjusted R
Std. Error
Handout 06-3 Statistical Power
a
What is statistical power?
It is the probability that a study will give a significant result if the research hypothesis {H1} is true.
- Notice the change in emphasis from a situation in which the null hypothesis (H0) is
APSY 3/5/08 t-test State your hypotheses Collect your data and compute your sample stats Decide whether to reject the null hypothesis o Set alpha level o Determine critical value o Compare your sample test stat (was Z now t) to critical value Describ