Summary and grouping of statistics

As a result of statistical observation, “raw” material, records of individual units of observation are obtained. This material is not suitable for direct use for either practical purposes or scientific analysis. There is a need for special processing of statistical data, i.e. in the summary of observation materials. The summary is a set of sequential […]

Checking the significance of the regression equation

After the regression equation is constructed and its accuracy is estimated using the coefficient of determination, the question remains how this accuracy is achieved and, accordingly, whether this equation can be trusted. The fact is that the regression equation was built not on the general population, which is unknown, but on a sample from it. […]