Calculators

Calculates the difference between the observed value and the predicted value from a regression model.

Calculates the engagement rate for social media posts. Engagement rate is a key metric for evaluating the effectiveness of content and the level of audience interaction.

Calculates Defects Per Million Opportunities (DPMO), a quality metric representing the number of defects per million opportunities in a process.

Performs a non-parametric test to compare differences between two independent groups when the assumption of normality is violated. It calculates the U statistic and associated p-value.

Calculates the entropy (average level of information, surprise, or uncertainty) inherent in a variable's possible outcomes.

Calculates the statistical significance and other key metrics for A/B test results.

Calculates a single value used to estimate a population parameter, such as the sample mean estimating the population mean.

Estimates the minimum sample size required to achieve a desired level of confidence and margin of error for a study.

Calculates the standard error, which measures the accuracy with which a sample represents a population. It's commonly used for the standard error of the mean (SEM) and the standard error of the proportion.

This calculator determines the F-statistic, a value used in ANOVA (Analysis of Variance) to compare the variances of two or more samples. It helps determine if the variances are significantly different.