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F Distribution Table

F Table for α = 0.10 (Click to zoom in) F Table for α = 0.05 (Click to zoom in) F Table for α = 0.025 (Click to zoom in) F Table for α...

Chi-square Distribution Table

The chi-square distribution table below shows the critical values for different probability levels (P) and degrees of freedom (DF).

Mann-Whitney U Test Calculator

A Mann-Whitney U test is used to compare the differences between two independent samples when the sample distributions are not normally distributed and the...

Confidence Interval Calculator

This calculator creates a confidence interval for a population mean using the following formula: Confidence Interval = x +/- z*(s/√n) where: x: sample meanz: z-value...

Mann-Whitney U Table

The following tables provide critical values for two tailed Mann-Whitney U tests for various levels of alpha.  For one-tailed tests, simply double the value of...

Z Score Calculator

This calculator finds the standardized z-score for any raw value of X, a population mean, and a population standard deviation. A z-score simply tells us...

Interquartile Range Calculator

This calculator automatically finds the interquartile range for a given dataset. Simply enter the comma-separated values of the dataset in the box below and then...

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