A t-test is an inferential statistical test used to determine if there is a significant difference between the means of two groups and how they are related. T-tests are used when the data sets ...

What is the chi-squared test? The chi-squared test, often written as χ 2 test, is a statistical hypothesis test used in the analysis of categorical variables to determine whether observed data are ...

Understanding the Wilcoxon Test . The rank sum and signed-rank tests were both proposed by American statistician Frank Wilcoxon in a groundbreaking research paper published in 1945.

is a non-parametric statistical test used to compare two dependent samples (in other words, two groups consisting of data points that are matched or paired). As with other non-parametric tests, this ...