ACC 406 Lecture Notes - Lecture 2: Scatter Plot, Regression Analysis, Fixed Cost

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Cost behaviour: the relationship between cost and quantity. Variable cost + fixed cost = total cost. 3 methods: high low method, scatter graph method, method of least squares (a specific version of regression analysis, use these methods to estimate the cost formula, total cost = total fixed cost + (variable rate * quantity) In expression of symbols (y= f + (v)(x)) To use the method of least squares, we have steps: summation of x and y, use 2 equations to estimate v and f, v= (cid:894)xy(cid:895) = (cid:894)x(cid:895) (cid:894)y(cid:895)/(cid:374) = . 75: f= y /(cid:374) (cid:894)v(cid:895) (cid:894) x(cid:895)/(cid:374, cost formula = y = +(6. 75)(x) = : goodness of fit: to what extent is x able to explain y, measured by the coefficient of determination (r2, r2= v [ (xy) - (x) (y)/n. (y2)- ( y)2/n if r2 = 0. 72 the driver e(cid:454)plai(cid:374)s (cid:1011)2% of (cid:455)our co(cid:373)pa(cid:374)(cid:455)"s cost. The other 2(cid:1012)% explains other costs: coefficient of correlation: (r)

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