STATISTICS Some important points: Ø F distribution is coined by George W Snedewr in Honour of Sir Ronald a fisher. Ø Chi square (non parametric test) concept given by karl pearson. Ø Concept of normal distribution is given by De Mouire and person involved in this are laplace, gauss and W J Yoden. Ø Concept of regression is given by Sir francis galton in 1877. Ø Concept of T- distribution is given by WS Gooset. Ø Data which are collected for the first time are primary data. Ø Data is only quantitative. Ø Secondary data are second hand data which are in the form of published & unpublished. Ø Category of secondary data are also called paper source. Ø Median and mode are positional average. Ø Arthemetic mean , geometric, harmonic & weighted average mean are mathematical average. Ø ∑ know as capital sigma. Ø Property of arthemetic mean-: 1) Sum of all observations of the given set of observations from their artheme...