Biostats Calculator

Comprehensive array of tests easily accessible

All 12 biostatistical calculations are just a tap away when you launch Biostats Calculator, with related tests grouped for easy access.

Each test is presented on a single screen with the primary results clearly laid out below. More advanced statistical details are available for those that require them - just tap-and-hold the calculated p value.

Detailed explanations are included

Simply tap the title bar of any test to reveal a complete guide to:

• what the test is designed to measure
• when it can be applied
• how to enter your data
• how to interpret the results

Additionally, you can tap-and-hold any term on the screen to get a pop-up explanation of its meaning.

Available tests and calculations

• Odds ratio including confidence intervals and significance level.
• Relative risk with confidence intervals, significance level, and number needed to treat.
• Chi-square and Fisher's exact test with automatic test selection and continuity correction based on sample size.
• Unpaired t-test with individual or summary data entry, confidence intervals for the difference in means, and Welch's correction automatically applied where needed.
• Mann-Whitney U test
• One-way ANOVA for any number of groups
• Paired t-test including confidence intervals for the mean difference
• Wilcoxon signed-rank test
• Pearson's test for correlation with coefficients of correlation and determination
• Spearman's test for rank correlation with the rank correlation coefficient
• Sample size calculator for studies comparing continuous or categorical measures
• Diagnostic test utility

Features used in several tests

• Hypothesis testing and p values
• Confidence intervals
• Non-parametric tests