This tutorial explains how to calculate residuals in regression analysis. A Brief Overview of Simple Linear Regression Simple linear regression is a statistical method you can…

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This tutorial explains how to conduct a Kruskal-Wallis test in R. What is a Kruskal-Wallis Test? A Kruskal-Wallis test is used to determine whether or not there is a…

Chi-Square Tests and t-Tests are two of the most common types of statistical tests. Thus, it’s important to understand the difference between these two tests and how to…

In statistics, regression analysis is a technique that can be used to analyze the relationship between predictor variables and a response variable. When you use software (like…

This tutorial provides a simple explanation of the difference between a PDF (probability density function) and a CDF (cumulative density function) in statistics. Random Variables Before…

This tutorial explains how to find the inverse of a matrix in Excel. Finding the Inverse of a Matrix To find the inverse of a matrix…

This calculator finds the area of a polygon using the following formula: Area = (1/4)na2 * cot(π/n) where n = number of sides a =…

Given the radius of a hemisphere, this calculator finds the following metrics: Volume = (2/3)πr3 Circumference of the base = 2πr Base surface area =…

This calculator finds the percentage of marks obtained in one or more exams. Simply enter the overall scored total marks or the subject marks one…

This tutorial explains how to calculate the dot product in Excel. What is the Dot Product? Given vector a = [a1, a2, a3] and vector…