What is k in statistics?

In statistics, "k" is often used as a variable to represent the number of groups or categories in a dataset. For example, in a clustering analysis, "k" would represent the number of clusters that the data is being segmented into. In ANOVA (analysis of variance) tests, "k" represents the number of groups being compared.

Additionally, "k" is also commonly used to represent the sample size in a statistical test. For example, in a hypothesis test with a sample size of "k," the value of "k" would indicate the number of observations or individuals in the sample.

Overall, "k" is a versatile variable in statistics that is used to represent the number of groups, categories, or observations in a dataset or statistical analysis.