Misc - Statistics Outreach Center - Guides at University of Iowa

Missing Data

Modern methods for missing data
Presentation that describes how to do use maximum likelihood methods for dealing with missing data in SAS and Stata.
An overview of missing data
Presentation describing ways to evaluate and understand missing data, methods for handling missing data and their advantages and disadvantages, and useful Stata commands.
Missing data concepts
Conceptual discussion of missing data and implications for handling it.

Missing data treatment in SPSS and SAS

Missing data treatment Using R

Methods for imputing missing data in R

Sample Size and Power Analysis

G*Power
G*Power covers many different statistical tests of the F, t, chi-square, and z test families as well as some exact tests. Effect size calculators and graphics options are available. Offers five different types of power analyses.
Power Analysis
The link provides Power and Precision manuals for calculating power and sample sizes from t-tests and ANOVAs to Logistic Regressions and survival analyses.
Pass - NCSS
Program for power analysis and sample size calculation. Manual and demonstration video available.

Frequently Used Resources

UCLA

UCLA idre (Institute for Digital Research and Education Center) provide resources for R, SAS, SPSS, and STATA: how to start, data analysis procedure and examples by various topic such as data management, graphics, ANOVA, Regression, Multilevel Modeling, etc.

Princeton University

The Data and Statistical Service of Princeton University provides useful materials of Getting Started in Data Analysis series using Stata, R, and Excel.

Sites with Useful Links

List of useful links
This site has links to lots of useful psychometric information on the web.
Free Statistical Software
A list of free statistical software organized by statistical method with descriptions of features.

Online Lectures

Free online lectures

Coursera offers free short lecture courses from universities, including statistical and programming courses. They are time limited. Create an account to access the available courses.

Statistics Lecture 21 Vedio

Playlists of Statistics I & II courses from the University of California Berkley.

Online Textbooks

Free Statistics Textbooks

StatSoft E-Statistics Textbook: Dell Software Company provides free online statistics textbooks organized topic.
SOCR Books: Statistics Ebook available online.

Statistics Advice

The Analysis Factor
Easy to understand blog postings on a variety of topics, mostly free with some paid content - training webinars etc.

University Libraries

Statistics Outreach Center: Misc