Calculators

There are several Excel-based calculators available for free download in Research Engineer.

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Download G*Power to calculate the needed sample size for chi-square, Mann-Whitney U, independent samples t-test, one-way ANOVA, McNemar's test, Wilcoxon, repeated-measures t-test, repeated-measures ANOVA, Pearson's r correlation, and the point-biserial correlation.

Free Excel-based calculator for diagnostic testing calculations like sensitivity, specificity, Youden index, positive predictive value (PPV), negative predictive value (NPV), and total diagnostic accuracy.