MGT-3100 Lecture Notes - Lecture 4: Electric Light, Analysis Of Variance, Bias Of An Estimator
8 Mar 2018
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Document Summary
In regression, the decomposition of the total sum of squares (sst) into the explained sum of squares (ssr) and the unexplained sum of squares (sse) took place in the analysis of variance or anova table. However, anova also refers to a statistical technique used to test for diffferences between the means for several populations. While the procedure is related to regression, in anova the independent variable(s) are qualitative rather than quantitative. In both regression and anova the dependent variable is quantitative. Example 1: as city manager, one of your responsibilities is purchasing. The city is looking to buy lightbulbs for the city"s streetlights. Aware that some brands" lightbulbs might outlive other brands" lightbulbs, you decide to conduct an experiment. Seven lightbulbs each are purchased from four brands (ge, dot, west, and a generic) and placed in streetlights. The lifetime of each of the 28 lightbulbs is then recorded in the file lightbulbs.
