DAT 565 Practice Week 6 Knowledge Check

DAT 565 Practice Week 6 Knowledge Check

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Attachments: DAT 565 N2 Practice Week 6 Knowledge Check.docx [ Preview Here ]

 

  1. Which of the following measures of fit is expressed in percent?
  2. Using exponential smoothing, if Ft = 220, yt = 240, and α = .20, what is the new forecast Ft+1?
  3. In a multiplicative model, if the seasonal factor is 1.15 for a particular season, then we expect that the time series in that season would be (other things being equal)
  4. Suppose the estimated quadratic model yt = 500 + 20t − t2 is the best-fitting trend of sales of XYZ Inc. using data for the past 20 years (t = 1, 2, . . . , 20). Which statement is incorrect?
  5. If we fit a linear trend to 10 observations on time-series data that are growing exponentially, then it is most likely that
  6. For these data, what is the three-period centered moving average for period 4?
  7. A trend line has been fitted to a company’s annual sales. The trend is given by yt = 50 + 5t, where t is the time index (t = 1, 2, . . . , n) and yt is annual sales (in millions of dollars). The implication of this trend line is that sales are expected to increase
  8. Which statement is correct for a simple index number?
  9. The fitted annual sales trend is Yt = 187.3e−.047t. On average, sales are
  10. Using exponential smoothing, if Ft = 33, yt = 41, and α = .20, what is the new forecast Ft+1?

 

 

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