ADM 2304 Quiz: assignment 4
18 Feb 2019
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The scatter plot shows a positive association between x and y. As the advertising expenses increases, the market share also increases. Pearson correlation of x and y = 0. 960. There is strong positive correlation between x and y. Therefore, from the minitab output, the regression equation is: R2 is called the coefficient of variation and it specifies how much of the variation in the y" data is explained by the regression. Its maximum value can be 1" and minimum value can be 0". The coefficient of correlation is the r value which is given in the summary table in the. R square is also called the coefficient of determination. Multiply r times r to get the r square value. In other words, the coefficient of determination is the square of. The reduced regression is better because r-sq adj is 94. 076% which is greater than that of the full regression equation which is 91. 46%.
