Calculators

A one proportion z-test is used to compare an observed proportion to a theoretical one.…

A z-score tells you how many standard deviations away an individual data value falls from…

A confidence interval for a difference between means is a range of values that is likely to…

The Poisson distribution is one of the most commonly used distributions in statistics. This calculator…

A Chi-Square Goodness of Fit Test is used to determine whether or not a categorical…

This calculator creates a prediction interval for a given value in a regression analysis. Simply…

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

This tool automatically generates a normally distributed dataset based on a population mean and standard…

A sampling distribution is a probability distribution of a certain statistic based on many random…

The mean absolute percentage error (MAPE) is a metric that tells us how far apart…