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Summary Statistics Calculator

Shannon Diversity Index Calculator

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

Grand Mean Calculator

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

Outlier Boundary Calculator

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

Number Needed to Harm Calculator

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

Attributable Risk Calculator

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

Upper and Lower Fence Calculator (With Explanation)

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

Cohen’s Kappa Calculator

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

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