Khi phân tổ thì tuỳ theo biểu hiện thuộc tính của tiêu thức để quyết định phân tổ có hay không khoảng cách tổ

previous business sales - c.

a manufacturer of printed circuit boards uses exponential smoothing with trend to forecast monthly demand of its product. at the end of december, the company wishes to forecast sales for january. the estimate of trend through november has been 200 additional boards sold per month. average sales have been around 1000 units per month. the demand for december was 1100 units. the company uses α = 0.20 and β = 0.10. make a forecast including trend for the month of january.

answer; coefficient of correlation;

answer; /// radio frequency identification;