03. Central Tendency & Variability

Resources: Stats of Doom

A comprehensive site created by Dr. Erin Buchanan offering lecture materials and videos for a full range of statistics concepts covered in a basic/introductory course (descriptives, graphs, z-scores, t-tests, ANOVA, correlation, regression, chi-square, etc.). Coverage also includes materials for several statistics packages (e.g., SPSS, JASP, R) Here is a link for a basic course. There …

Student Guide to SPSS and APA Style Writing (v.12.0)

This guide (created by Gary Lewandowski; Twitter: @LewandowskiPhD) is a free resource that can substitute for the APA Manual and SPSS guides. The Student Guide leads students through data analysis in SPSS with step-by-step instructions and screenshots for setting up the analyses and interpreting the output. For each analysis, students also see an example SPSS …

Video: Frequencies and Descriptive Statistics (SPSS for Beginners)

Video (14:01) from Research by Design and Dr. Todd Daniel, described as follows, “Having learned how to create a variable, you are ready to begin entering data. Dr. Daniel begins with descriptive statistics (numbers that describe our data) and shows you how to do some basic data cleaning and data exploration with the Frequencies command …

Video: Computing Central Tendency and Variability in JASP

Concise video (9:50) from Research by Design in which, “We walk through the steps to identify three measures of central tendency (mean, median, and mode) using JASP. This is an excellent introduction to JASP software and some of the functions that we will use throughout the introductory statistics course.” (7:41) “We will learn how to …

Video: Mean, Variance, and Standard Deviation

This video (14:21) explains the statistic fundamentals of central tendency and variability from StatQuest with Josh Starmer. Bam. You can find the StatQuest website here.

Design & Data: How Do You Know If You Are Truly Helping? (Program Evaluation)

Key Topics and Links to Files Data Analysis Guide Applying Your Skills in the Real World: How Do You Know If You Are Truly Helping? Analyses Included: Single Sample t-test; t-test for Independent Means; Creating a Mean; Descriptive Statistics (Central Tendency)   Dataset Syntax Output BONUS – STUDY 1: How Can We Reduce Underage Drinking? …

Activity: Orange You Glad for Descriptive Statistics?

This is a lab or classroom activity “Oranges Are the New Statistics“(created by Kathrine Frey Frøslie) that has students peel oranges and collect data from various aspects of the experience (e.g., number of wedges, speed of peeling, weight of oranges, etc.) Students then use this data to calculate descriptive statistics such as central tendency, and …