MODULE 1 SAMPLING THEORY, VARIANCE, AND CORRELATION The general aim of this module is to provide the student with a thorough understanding of the basic statistical tools that will be needed for regression analyses in the subsequent module. As well as random variables and sampling theory, Covariance, variance, and correlation are to bedemystified for proper understanding. By the end of this module,students would have been able to understand the basic parts of regression analysis. The units to be studied in this module are