Summary Statistics Calculator

A trimmed mean is the mean of a dataset that has been calculated after removing a specific percentage of the smallest and…

Simpson’s Diversity Index is a way to measure the diversity of species in a community. To calculate this index for a given…

In statistics, x-bar (x) is a symbol used to represent the sample mean of a dataset. To calculate x-bar for a given…

The Shannon Diversity Index is a way to measure the diversity of species in a community. To calculate this index for a…

A grand mean is calculated as the average of the means of several groups. To calculate the grand mean, simply enter the…

The interquartile range, often abbreviated IQR, is the difference between the 25th percentile (Q1) and the 75th percentile (Q3) in a dataset.…

Number needed to harm (NNH) refers to the average number of patients who need to be exposed to some risk factor to…

This calculator finds the attributable risk, attributable risk percentage, and population attributable risk percentage for a given 2×2 contingency table. Simply fill…

In statistics, the upper and lower fences represent the cut-off values for upper and lower outliers in a dataset. They are calculated…

Cohen’s kappa measures the level of agreement between two raters or judges who each classify items into mutually exclusive categories. The formula…