This example produces two bar charts that show total sales for three sites by charting the values of the character variable SITE and calculating the sum of the variable SALES for each site. In the ...

Refer to page 226 in Montgomery (1996). Each curve plots the probability of not detecting a shift of magnitude in the process mean as a function of .The value of is computed using the following ...

Xiaojie Liu / Investopedia. How a Random Variable Works . Random variables are used in probability and statistics to quantify outcomes of a random occurrence, and they can therefore take on many ...

An endogenous variable is a variable in a statistical model that is changed or determined by its relationship with other variables within the model.