Statistics Tutorials

Do Categorical and Binary Survey Items Need a Reliability and Validity Check?

Which tool you use most, whether you have ever paid, how much you spend per month — none of these are candidates for Cronbach's alpha, CR, AVE, or CFA. Why the statistics don't apply, what to report instead, and what a run produced for answering a reviewer. Demo data, 300 respondents.

· Survey Methods

Your Nonparametric Test Is Significant. Is the Result Actually Meaningful?

A Kruskal-Wallis result of H(2) = 100.274, p < .001 looks decisive and still leaves three questions open: which groups, how much, and what the grouping variable is made of. One real output read line by line, including the null result next to it. Demo data, N = 290.

· Academic Reporting

Pearson or Spearman? Who Decides Which Correlation to Run

A walkthrough of correlation analysis in ChatSRS where the coefficient choice was left open on purpose: one skewed variable, a plain-English prompt, and the product's own reasoning for picking Spearman. Demo data, N = 290.

· Statistical Tutorial

How to Run Descriptive Statistics Online: A Full Walkthrough

A full walkthrough of cleaning survey responses and running descriptive statistics online in ChatSRS: one plain-English prompt for the data-quality check, the drop list it returns, and the sample table once the excluded rows are gone. Demo data, N = 290.

· Statistical Tutorial

Mediation Analysis Without PROCESS: A Bootstrap Walkthrough

Run a mediation analysis without installing Hayes' PROCESS macro: describe the model in one line and get bootstrap indirect effects, confidence intervals, and path coefficients back in one pass. Demo data, N = 300.

· Statistical Tutorial

How to Analyze Survey Data Online Without SPSS

A practical online survey analysis workflow covering coding, missing data, Likert items, reliability, group comparisons, regression, diagnostics, and reporting.

· Survey Analysis