Review Quizzes
1. Sample surveys such as the General Social Survey and the Current Population Survey are
an important kind of:
a. Census
b. Observational Study
c. Experiment
d. Individual
(2-3) Brian
Review Quizzes
1. If a statistical study systematically favors certain outcomes, then it is called:
a. A voluntary response sample
b. A convenience sample
c. A simple random sample
d. Biased
2. Americ
2. Samples
Sampling is the selection and implementation of statistical observations in order to
estimate properties of an underlying population. Sampling is a vital part of many
statistical research i
Chapter 2
Samples, Good and Bad
James F. Glasgow, Ph.D.
Malone University
Chapter 2
1
How to Sample Badly
Ambulance
Call-In phone survey
3763 total calls
638 from Ambulance Company Office
Others f
April 22, 2014
Survey Analysis: Energy
Each student present in our statistics class on April 8, 2014 completed a survey on energy.
I do not think that the individuals in this survey that make up the s
The Underlying Variables of Statistics
There was an understanding that this was a math course, but the real confusion was when this
also counted as a psychology course. As our group discussed, we disc
Statistics Project One
2/5/09
Introduction
Statistics are all around us and are used to describe, analyze, organize or predict data in
our day to day activities that we are involved in. These statisti
Statistics Project Three
4/19/09
I have been a runner for a couple years now and one thing that I have always heard is that
long distance runners have better discipline than other athletes which usual
z-Scores
Chapter 5 & 6
Normal Distribution
Many variables are distributed with most
observations concentrated near the
center of the distribution. As you move
from the center, the frequencies of
obser
Measures of Central Tendency
Chapter 3
Definition of Central Tendency
The tendency for observations to center around a
particular value/category rather than being
dispersed across a range.
Identifie
Hypothesis Testing
Elements in Hypothesis Testing
1)
2)
3)
4)
Null and alternative hypotheses
Decision Making
Test statistic
Conclusion
Hypotheses
Definition of Hypothesis
A statement used in research
Probability
The World of Chance?
Where are we going?
We have now completed our discussion of
descriptive statistics. We are now ready
for the fascinating world of inferential
statistics.
The basic aim
t-Test for Independent Samples
A Case of Testing a Hypothesis
Our question is whether violent TV
programs cause children to become more
aggressive.
H0: Violent TV does not cause children to
become m
Analysis of Variance
ANOVA
t-Test vs. ANOVA
A t-test and ANOVA are applied to similar types
of data.
The drawback of the t-test is that it can only be
used in cases where there are two groups. In
ma
Measures of Variability
Chapter 4
Definition of Variability
Variability is a measure of dispersion. That is, it is a
measurement of the degree to which scores in a
distribution are spread out.
There a
Chapter 10
Graphs, Good and Bad
Chapter 10
1
Thought Question 1
What is confusing or misleading about the
following graph?
21
Interest Rate
20
19
18
17
16
15
Household
Bank
Central
Bank
Average
Bank
C
Chapter 14
Describing Relationships:
Scatterplots and Correlation
Chapter 14
1
Thought Question 1
For all cars manufactured in the U.S., there
is a positive correlation between the size
of the engine
Chapter 9
Do the Numbers Make Sense?
James F. Glasgow, Ph.D.
Malone University
Chapter 9
1
Thought Question 1
In 1994, according to the Department of
Labor, the median salary for government
workers wa
Statistics
What is
STATISTICS?
Why do I need
STATISTICS?
Statistics
What is
STATISTICS?
Why do I need
STATISTICS?
Statistics
What is
STATISTICS?
Why do I need
STATISTICS?
Any benefit I can
get from a
Stats Class Notes
1.
2.
3.
4.
Chapter 1
Process of Statistics
Identify a research objective - Determine the question that needs to be answered
Collect Data - Identify group to be studied, do this thro
Chapter 3
Inferential Statistics - Use sample data to draw inferences about a population with an unknown
characteristic of interest. Probability is used as a basis for inferential statistics
Paramete
Chapter 13
Normal Distributions
Chapter 13
1
Thought Question 1
Birth weights of babies born in the United
States follow, at least approximately, a bellshaped curve. What does that mean?
Thought Quest
Chapter 3
What Do Samples Tell Us?
James F. Glasgow, Ph.D.
Malone University
Chapter 3
1
Sampling Terminology
Parameter
fixed, unknown number that describes the population
Statistic
known value ca
Malone University
Math-140 Statistics
James F. Glasgow, Ph.D.
Making Sense of Statistics
Statistics
About data
Data Numbers with a context
Context
Engages our background knowledge and allows us to
Chapter 22
What Is a Test of Significance?
Chapter 22
1
Thought Question 1
The defendant in a court case is either guilty
or innocent. Which of these is assumed to be
true when the case begins? The ju
Chapter 21
What Is a Confidence Interval?
Chapter 21
1
Thought Question 1
Suppose that 40% of a certain population
favor the use of nuclear power for energy.
(a) If you randomly sample 10 people from