What is the chi-square distribution graph? The test statistic in the chi-square goodness-of-fit test or the test of independence follows the chi-square distribution. The chi-square distribution graph is asymmetrical in shape. It is skewed to the right, and its shape...

What is the chi-square test of independence? Let’s say there are two categorical or nominal variables. And we want to know whether the two variables are related. For example, let’s say there is a movie hall. Certain categories of movies are shown there. People go...

What is the chi-square goodness-of-fit test? The chi-square goodness-of-fit test is a non-parametric hypothesis test. This test is used to determine whether a variable is likely to follow a specified distribution. For example, let’s say we rolled a die 60 times. Now,...

What is the Kruskal-Wallis test? The Kruskal-Wallis test is often performed to test whether the difference between the medians of two or more groups are statistically significant. The Kruskal-Wallis test is a non-parametric equivalent of the one-way ANOVA test. This...

What is the Spearman Rank Correlation test? The Spearman rank correlation test is a method of testing the strength and direction of the correlation between two variables. For example, let’s say we are given the marks of two subjects, Subject 1 and Subject 2, for ten...