Statistics Tools

When performing a two sample t-test, we typically assume that the variances between the two…

This calculator finds the area under the normal distribution between two z-scores. Simply enter the…

Number needed to harm (NNH) refers to the average number of patients who need to…

When you conduct a single statistical test to determine if two group means are equal,…

This calculator produces a logarithmic regression equation based on values for a predictor variable and…

This calculator produces an exponential regression equation based on values for a predictor variable and…

This calculator automatically finds the mean, standard deviation, and variance for any probability distribution. Simply…

This calculator finds the attributable risk, attributable risk percentage, and population attributable risk percentage for…

In statistics, the upper and lower fences represent the cut-off values for upper and lower…

Cohen’s kappa measures the level of agreement between two raters or judges who each classify…