Statistics tools and calculators
A set of free calculators for the statistics a dissertation or thesis actually needs: planning the sample size, choosing the right test, reporting results in APA style, and checking reliability and effect size. Each one shows the formula behind the number, so it is a working tool, not a black box.
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Sample size and power calculatorFind the sample size you need, or the power you have, for t-tests, ANOVA, correlation, and regression.Open tool Statistical test selectorAnswer a few questions about your design and get the statistical test that fits, with the reasoning shown.Open tool
More calculators
APA results formatterTurn a t, F, chi-square, or correlation result into a correctly formatted APA sentence.Open tool Cronbach's alpha calculatorPaste your item-by-respondent scores and get Cronbach's alpha with per-item reliability statistics.Open tool Effect size calculatorCompute Cohen's d, Hedges' g, eta-squared, and convert between odds ratios and risk ratios.Open tool Descriptive statistics calculatorPaste a column of data for the mean, median, SD, variance, skewness, kurtosis, and a 95% confidence interval.Open tool
Working through the analysis itself? The statistics guides explain the methods behind these tools, and dissertation data analysis help covers the full results chapter when you would rather hand it over.