stats101

Contents:

• Introduction
  • Inferring from a sample
  • Types of samples
  • Description and inference
  • Units of observation
• Data sources
  • Software
  • Data structure
  • Tutorial data
• Levels of measurement
  • Nominal
  • Ordinal
  • Interval
  • Ratio
• Central tendency
  • Mode
  • Median
  • Mean
• Measures of spread
  • Range
  • Inter–quartile range
  • Variance
  • Standard deviation
• Standard error and confidence intervals
  • Comparing means and confidence intervals
• Normal distribution
  • Skewness
  • Kurtosis
• Hypothesis testing
  • Null hypothesis
  • Errors interpreting the results
  • Directional tests
• Chi–squared test
  • Test statistic
  • Degrees of freedom
  • p value
  • Assumptions
  • Odds ratio
• Correlation
  • Pearson’s correlation coefficient, \(r\)
  • Spearman’s \(\rho\)
  • Kendall’s \(\tau\)
• Comparing two independent groups
  • \(t\)–test
  • Mann–Whitney U
  • Dependent groups
• Comparing three or more means
  • Example
  • Assumptions
  • Equality of variance
  • ANOVA

Indices and tables

• Index
• Module Index
• Search Page