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GUIDE
1: INTRODUCTION
GUIDE 2: CONSTRUCTING A TABLE GUIDE 3: UNIVARIATE STATISTICS AND DISPLAYS GUIDE 6: MULTIVARIATE CROSSTABULATIONS GUIDE 7: BASIC REGRESSION GUIDE 8: REGRESSION SPECIFICS GUIDE 9: SAMPLING |
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EDF 5400-01 SUMMER 2004
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INTRODUCTORY DESCRIPTIVE
AND INFERENTIAL STATISTICS
ALSO KNOWN AS: BASIC
DATA ANALYSIS
Dr. Susan Carol Losh
Department of Educational
Psychology and Learning Systems
Florida State University
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OVERVIEW |
MATERIALS |
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INFO |
TOPICS |
| MY OFFICE: 307K Stone Building
850-644-8778 OFFICE HOURS: Exceptions to be announced 1:00-3:00 P.M. Monday & Wednesday & by appointment |
FSU Stone Building
INSTRUCTOR: Professor Susan Carol Losh
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My assistant for this course is Mr. Brandon
Vaughn. He will assist you with assignments, assist me with grading, and
will also be available prior to exams.
| Brandon Vaughn
OFFICE HOURS:
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PLEASE INFORM ME IMMEDIATELY
IF YOU REQUIRE ANY ASSISTANCE WITH DISABILITIES!
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I want to begin by tossing you a "curve ball" or a shock:
At this level, I DO NOT teach statistics.
I DO teach data analysis.
Although many of the topics covered are the same (e.g., hypothesis testing), the approach is very different. You will learn a lot about VARIABLES, what they are and what you can do with them. There will be some formulas but generally you won't have to memorize them (although you WILL need to memorize some symbols). This is a consumer-oriented approach to data. At the end of this course, I want you to be able to:
Do
basic analysis on your own data, for example, for a Master's thesis, doctoral
dissertation or a conference paper.
Be able to read and understand basic data analysis in your field, for example,
in a professional journal or conference paper.
Be able to understand basic data analysis, including charts, graphics and
tables in regular media, such as a magazine or newspaper.
For many of you, I know that this is the only statistics course that you will ever take.
You come from an exceptionally wide variety of major fields and schools or colleges at FSU.
Some of you wereDRAGGED here by your major professor or your program requirements, others have come joyously because this is the first of several quantitative courses that you anticipate electing--or the middle course of several you have taken and plan to take.
Understanding complex statistics really does require courses in calculus, linear algebra, and other college-level math courses to see "the big picture." And I think this kind of math background is probably necessary if you want to teach statistics.
But you don't have to be able to build a Digital Video Player to program a movie. And you do not have to be a mathematician to understand data analysis and apply it appropriately, or to understand whether someone has chosen the appropriate statistical tools and applied them correctly in a conference presentation or an article.
You must, however, understand what the concepts MEAN.
I will have you analyze data via computer to illustrate and to recognize these constructs.
You will learn the Berkeley "Survey Documentation and Analysis" (SDA) system ONLINE, that is, on the Internet, to do so. The SDA is an award winning sytem developed at the University of California, Berkeley, and used by many federal government and university systems to access and analyze many sets of archival data so it can be generalized. It is eye-blinkingly rapid and simple to use. Because we realize this is a new experience for many of you, I and Brandon will be here to help you.
The important thing is not "can you program
right" but can you meet:
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Understand the kind of data that you have?
Definitions of nominal, ordinal, interval, and ratio data are easy to memorize. Discovering how these concepts correspond to the questionnaire items in your dissertation survey or the materials in your ethnography is typically difficult.
Understand the appropriate analytic tools to use?
I ALWAYS emphasize staying within your own understanding. Better to use a more simple technique that you understand thoroughly than a "fancy one" that you do not. Can you detect when the author of a conference paper used a statistical tool that made absolutely no sense?
Understand what your results mean?
For example, can you look at your results--or those in a journal article?--and comprehend whether they are an accident--a random and probable fluxuation from a sample finding--or whether they designate something that may be statistically real?
If your results are "real," how strong are they? When we study hundreds or thousands of cases, our results are typically stable, they won't vary much from sample to sample--but they could be trivial and substantively meaningless. How do you know if your results are at least moderately strong, or so weak that you would be embarrassed to see them published in the Tallahassee Democrat (or anywhere else)?
Understand
where your results fit in the causal scheme of your own and others' research?
It is insufficient to simply report results,
results
are interpreted. Did your original substantive hypotheses receive
any support? Were they unequivocally rejected? Did they make sense in your
causal system?
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Previous experience with research methods
and statistics may be helpful, but is definitely not essential.
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Alan Agresti and Barbara Finlay, Statistical Methods for the Social Sciences (THIRD EDITION). Upper Saddle River, NJ: Prentice Hall, 1997. ISBN = 0-13-526526-6
Darrell Huff, How to Lie with Statistics. New York: W.W. Norton Company, new printing: 1993 (original printing 1954). ISBN = 0-393-31072-8
ALL MY COURSE LECTURES will be placed on the Internet and linked in with each course topic.
Course guides will be keyed to the readings. See the top of each Guide as it is posted.
Although I may not cover all the material in each one, you are responsible for ALL the material in each guide. That is why they are on the Internet.
I recommend that you read my online guides FIRST. They emphasize the portions of the material that I think are the most important for this course. I also think it may be easier for you to understand the text after you have read the associated guide.
Some of the material in the guides will be covered during class. However, class time will also be used for instruction related to each assignment, demonstrations, exam review, and assignment and exam feedback.
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Below is information about assignments, exams, due dates, and course weights.
There
will be three equally weighted exams, each about one hour.Each
exam counts 25 percent toward your final grade. While
each exam will focus on the immediately prior units, be advised that much
of the this material is cumulative in nature. In addition, if a concept
or concepts appears to give considerable trouble in one exam, I will probably
include questions addressing that concept on the next exam. Exams will
be a mix of short answer, short essay and multiple choice and have a strong
problem-solving orientation.
Assignments are designed and weighted so that if you make a mistake, it will not hurt your final grade to a large extent, and mistakes can then be corrected on the exams, which weight more heavily. I have had students "borrow" another student's homework. They receive an "A" on the homework, then flunk the exams. That is a very BAD strategy.
All
five assignments put together will count a total of 25 percent toward your
final grade.
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Assignments have several primary foci:
To gain first-hand familiarity with several basic types of data analysis.
While the most immediate use is for those analyzing data for a paper, thesis
or dissertation, consumers will gain knowledge too. With some experience
in data analysis, you will find that you will be a more knowledgeable data
consumer.
To help develop your basic analysis and results interpretation skills.
For example, nearly every assignment has you explain in words
what your results mean.
To alert you to common problems that occur with different kinds of statistical
analyses and ways to solve these problems.
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| 1: Introduction and category properties | May 26 | 5 percent |
| 2. Central tendency and variation | June 7 | 5 percent |
| EXAM ONE (STUDY GUIDE TO BE LINKED HERE) | June 16 | 25 percent |
| 3. Two way
cross tabulation and correlation coefficients
T-test Practice |
June 30 | 5 percent |
| EXAM TWO (STUDY GUIDE TO BE LINKED HERE) | July 12 | 25 percent |
| 4. Three way cross-tabulation and causal interpretations | July 19 | 5 percent |
| 5. Multiple Regression | July 28 | 5 percent |
| EXAM THREE (STUDY GUIDE TO BE LINKED HERE) | August 4 | 25 percent |
| IMPORTANT NOTE! IMPORTANT! |
OUR EXAMS WILL BE CLOSED-NOTE, CLOSED
BOOK. Here are some of the things you can expect to see on exams:
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Interpreting computer
output, for example:
If you don't understand the concepts in
this material, a mountain of books and notes won't help you (although you
may feel more secure). If you do understand them, it is unlikely you will
need notes or books for the exams.
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| We are on a very tight schedule so assignments must reach me BY THE DUE DATE. Because of the intensive nature of this course, late assignments are not accepted. |
| IN GENERAL, I DO NOT ACCEPT EMAIL ATTACHMENTS!
PLEASE DO NOT SEND THEM.
There have been too many problems with computer viruses. This is especially true for University computers, which have proven to be hotbeds of infection. PLEASE DO NOT SEND DOCUMENT OR HTML ATTACHMENTS TO MY E-MAIL BOX. PLEASE DO NOT SLIDE PAPERS UNDER MY DOOR OR UNDER THE EDUCATIONAL PSYCHOLOGY SUITE DOOR! If you slide papers under my door, they
may or may not be placed on my desk--where I may not be able to find them!
Anyone who has seen my desk will NEVER do anything so foolish. Similar
problems occur with materials slid under the Educational Psychology and
Learning Systems suite door.
Here are some alternatives if you absolutely cannot hand assignments to me in person:
Sorry for the paranoia but I have been
sent worms, bugs, Snow White and the Seven Dwarfs (trust me: you DON'T
want
to know), and just about every common and uncommon virus around. If you
have heard of it, I almost certainly have been sent it.
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Be sure to visit this site again! |
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While each assignment focuses on unit readings and other course requirements, material on data analysis is cumulative by nature. For example, the level of measurement in your variables is considered throughout.
I use plus and minus grading, throughout and for final grades. Improvement over the course of the semester is considered in grading, and exams weight more heavily toward your final grade than exercises.
If I think you are having trouble with the material, I will alert you immediately and I expect you will seek remedial help as quickly as possible. If you receive such an alert, please take it very seriously. Do not tell me that you "really understand the material" and fail to seek help. I issue such alerts because the work makes it obvious the student DOES NOT understand the material.
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Our course is WEB assisted through the CourseInfo/Blackboard 6.0and WEB-MC systems at FSU. You MUST be registered for edf5400-01 to access our Blackboard site. To access our course through Blackboard, here is what to do. Go online to:
(You will be forwarded to the new, more
complicated url. The above works and is easy to remember.)
Enter your GARNET username (USERNAME
ONLY!) and password to log in. For example, I would enter "slosh" ONLY
and omit the "@garnet.acns.fsu.edu" part. Then click on “DES/INF STATSTCS
APP” to enter our site.
If you DON'T have a garnet account, you need to get one NOW. Go to the Academic Computing and Network Services website (address below) and follow the links to register online for your garnet account at FSU.
Scroll down to the "Computer Accounts" link at acns to start an email account if you don't already have the garnet or mailer account that is required to log into BlackBoard.
Our course can also be accessed directly through the WEB-MC system. Go to:
(That's THIS WEB address.)
You can link to nearly all the course sites
from this central location.
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I will use WEB-assist for several course features:
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| May 10-17 | Conceptual and operational
variables.
Independent, intervening and dependent variables Discrete and continuous variables Levels of Measurement |
Navigating our course WEB sites
What are the characteristics of a variable? Causality 101 What are nominal, ordinal, interval and ratio variables? |
| May 26 | Basic univariate frequencies, recoding
data, and
percentage table construction |
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| MAY 31 | MEMORIAL DAY HOLIDAY | UNIVERSITY CLOSED |
| May 19-June 7 | Everything you wanted to know about a
single variable
Tabular arrays Basic presentations of data Measures of central location & variation Normal curve 101 Confidence intervals Graphic displays |
How to construct
a univariate table
Basics of the SDA online system Percents, rates, change over time, ratios Measures of central location & variation Charts, graphs, icons |
| June 7 | Central tendency and variation | |
| June 14 | EXAM ONE REVIEW | Univariate basic statistics |
| June 16 | COVERS MATERIAL THROUGH GUIDE 3 | |
| June 9-23 | Constructing Bivariate Tables
Is an apparent relationship "Real" or "Accidental"? Classical Hypothesis Testing Substantive Significance Selecting Measures of Association Differences across groups |
Learning the "pieces"
of a Table
Bivariate Crosstabulations Introduction to classical hypothesis testing Chi-Square Correlation coefficients: "PRE" issues T-tests for independent groups |
| EXAM ONE FEEDBACK | ||
| June 30 | Bivariate Tables
Zero Order (Bivariate) Correlations T-test Practice Hypothesis Testing |
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| June 28-July 14 | Measures of Association and
Tabular Control
Multivariate Tables The Concept of Statistical Interaction Causal Issues in Non-experimental Data |
Three-way Crosstabulation
Tables
What's the Role of "Control Variables"? Extraneous,Spurious, Intervening Relationships Recognizing Interaction in Tables |
| JULY 5 | FOURTH OF JULY OBSERVED HOLIDAY | UNIVERSITY CLOSED |
| July 7 | EXAM TWO REVIEW | Basic bivariate statistics |
| July 12 | We can do a short review before also |
COVERS MATERIAL THROUGH GUIDE 5 |
| July 14-26 | Basics in Multiple Regression and Correlation | What happens with
at least two independent variables?
Multiple R Partial Correlations & Regression Coefficients Metric and Standardized Coefficients Confidence Intervals and Statistical Significance Interpreting Regression Analysis |
| July 19 | Three-Way Crosstabulation
Tables
With a Control Variable Causality Issues in Non-Experimental Data |
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| EXAM TWO FEEDBACK | ||
| July 28 | Working with multiple regression | |
| July 28-August 2 | Sampling and Probability | Probability and
Non Probability Samples
Issues with Sample Weights |
| August 2 | EXAM THREE REVIEW | Very basic multivariate statistics |
| August 4 | COVERS MATERIAL THROUGH GUIDE 9 |
A LECTURE (AND ASSOCIATED MATERIALS)
WILL BE LINKED WITH EACH TOPIC AS THE SEMESTER PROGRESSES.
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EDF 5400 READINGS AND ASSIGNMENTS |
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This page created with Netscape
Composer
and is best viewed with
Netscape Navigator
600 X 800 display resolution.
There may be some minor
changes as the semester progresses.
Your patience is appreciated.
Susan Carol Losh
May 5, 2004