#categorical data

Statistics & Data

Cross-Tabulations and the Chi-Square Test: Expected Counts, Fisher and Residuals

The chi-square test is the most-run test in survey theses and among the most misread. Expected counts, when to use Fisher, reading residuals to find which cells

24/09/2026 6 min read

Statistics & Data

Descriptive statistics done right: mean or median, SD or SE, and a clean Table 1

Average income is 2,500 a month, yet half the respondents earn under 1,200. Choosing the right measures of centre and spread, telling SD from SE, and presenting

24/09/2026 7 min read