Calculators
Outlier Calculator
An outlier is defined as any observation in a dataset that is 1.5 IQRs greater than the third quartile or 1.5 IQRs less than...
Calculators
Skewness and Kurtosis Calculator
Skewness is a measure of the asymmetry of a dataset or distribution. This value can be positive or negative. A negative skew typically indicates...
Calculators
Scatterplot Generator
A scatterplot is used to display the relationship between two variables.
To create a scatterplot for variables X and Y, simply enter the values for...
Calculators
Stem and Leaf Plot Generator
A stem and leaf plot displays data by splitting up each value in a dataset into a “stem” and a “leaf.”
To learn how to make...
Critical Value Tables
Chi-square Distribution Table
The chi-square distribution table below shows the critical values for different probability levels (P) and degrees of freedom (DF).
Calculators
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...
Calculators
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...
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