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QUESTION FIVE Sales of products for the past 12 months are shown below. Month Jan Sales 89 Feb 74 March April May June July 9

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e 0 sal a) Equation of regression line is = a tbx ; where a=y-bł yontly indexed b= Slui- st) lyi-y) und Elai- 2 Indexed frontall on calculations, get doing be 9.0944 a= 72.1364 Regression line as 72. 1364 +9.09444 b) Forecast salls 1.6. Month for nexd) coefficient of determination, R² R² = (Correlation coefficient) R² = (0.90395)² = 0.8171 in salls (y) 1.6., 81.71% of var

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