Summaries

• Arithmetic, geometric, and harmonic means, and corresponding confidence intervals
• Medians and percentiles
• Measurement of central tendency
• Skewness and kurtosis
• Confidence intervals
  • Means
    • Normal
    • Exact Poisson
  • Proportions
    • Exact binomial (Clopper–Pearson)
    • Wald
    • Wilson
    • Jeffreys
    • Agresti
  • Variance
    • Normal
    • Bonett
• Ratios , proportions , and totals
  • Confidence intervals
  • Standard errors
  • Over groups
  • Robust and cluster–robust SEs
  • Intragroup tests

Tables and tabulations

• 1- , 2- , n-way
• Pearson's chi-squared
• Likelihood-ratio chi-squared
• Cramér's V
• Fisher's exact (2 x 2 and r x c)
• Goodman and Kruskal's gamma
• Kendall's tau
• Cell statistics
  
  • Expected count
  • Contribution to Pearson chi-squared
  • Contribution to likelihood-ratio chi-squared

Tables of summary statistics

• Over groups and/or variables
• Statistics may include mean, count, sum, min, max, range, standard deviation, variance, variation coefficient, standard error of mean, skewness, kurtosis, median, percentiles, and interquartile range

Creation of datasets of summary statistics

• Statistics by group or subgroup of observations
• Statistics: mean, standard deviation, count, min, max, median, percentiles, and interquartile range

Pairwise comparisons of means

• Pairwise differences in means with tests and confidence intervals
• Multiple-comparison adjustments: Bonferroni, Šidák, Scheffé, Tukey HSD, Duncan, and Student–Newman–Keuls adjustments
• Group comparisons that are significant
• Balanced and unbalanced data