Data Analysis & Statistics

Numbers and Variables

• Quantitative and Qualitative Data (Australian Bureau of Statistics)
• Univariate and Bivariate Data (Math is Fun)
• Understanding Variables (Mary Dereshiwsky)
• Types of Variables in Statistics and Research (Statistics How To)
• Video: What is a dataset? (Elon University Poll)

Level of Measurement

• Levels of Measurement (Joseph Fletcher) 
• Levels of Measurement (Statology)
• Video: Types of Data - 6 min (Statistics Learning Centre) / Alternative: NOIR - 11 min (NurseKillam)
• Nuanced Views (Intermediate):
  • When a Variable’s Level of Measurement Isn’t Obvious (Analysis Factor)
  • Brief: Measurement Levels - What and Why? (SPSS Tutorials)
  • Frequently Asked Questions About Level of Measurement  (Pat Dattalo) - History of NOIR

Distributions

• Frequency Distribution / Bar Graph / Histogram / Grouped Histogram (Math is Fun)
• Frequency Distribution (Australian Bureau of Statistics)
• Same Stats, Different Graphs (Matejka & Fizmaurice)
• Explore: Exploring Histograms (Aran Lunzer & Amelia McNamara)
• Video: Frequency Distributions and Histograms: 1 2 3 4   (Larah Smith)

Comprehensive

• The Math you need to start (School of Data)
• Analyzing Quantitative Data pdf (UWEX)
• Simple Statistical Analysis (SkillsYouNeed)
• SOCS: A Helpful Acronym for Describing Distributions (Statology)
• Why Not to Trust Statistics (Math With Bad Drawings)

Center / Central Tendency

• Measures of Central Tendency (Australian Bureau of Statistics)
• Averages: Mean, Median and Mode (SkillsYouNeed)
• Measures of Central Tendency / Center (Math Bits Notebook)
• Video: Mean, Median, and Mode: 1 2 3  (Larah Smith)
• Video: Meausres of Center (against all odds)

 Variance / Dispersion

• Standard Deviation and Variance / Formulas (Math is Fun)
• Shapes of Distributions (Statistics How To)
• Basic Concepts (Boston University Biostatistics)
• Video: Standard Deviation (against all odds)

Percentiles

• Percentiles / Outliers (Math is Fun)
• Box plot (Math Bits notebook)
• Boxplots (aka, Box and Whisker Plots) (StatTrek)
• Video: Percentiles and Dispersion: 1 2 (Larah Smith)

Bivariate

• Two-Way Tables with Practice (Math Bits Notebook)
• Two-Way Tables in Statistics (StatTrek)
• Percentage Tables (MathCS.org)
• Video: How to read a cross tab (Elon University Poll)
• Video: Two-Way Tables (against all odds)