Statistical calculation is a branch of mathematics that deals with the collection, analysis, interpretation, and presentation of data. It involves the use of various techniques to measure and describe the characteristics of a given population. Three common statistical calculations are MEAN, covariance, and MODE. MEAN is the average of a set of numbers, calculated by adding all the numbers together and dividing by the number of values. Covariance is a measure of how two variables change together, and is calculated by taking the difference between each pair of values and then squaring the result. MODE is the most frequently occurring value in a set of data, and is calculated by counting the number of times each value appears in the data set.