Tutorials

A three-way ANOVA is used to determine how three different factors affect some response variable.…

A two sample z-test is used to test whether two population means are equal. This test…

A one sample z-test is used to test whether the mean of a population is less…

We can use the following formula to calculate the upper and lower bounds of a…

The exponential distribution is a probability distribution that is used to model the time we…

The uniform distribution is a probability distribution in which every value between an interval from…

One of the key assumptions of linear regression is that the residuals are distributed with…

Often in statistics we’re interested in collecting data so that we can answer some research…

When we want to understand the relationship between a single predictor variable and a response…

A Kruskal-Wallis test is used to determine whether or not there is a statistically significant difference…