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Weighted Moving Average and Early Periods

A weighted moving average having the early periods more heavily weighted
A. is more responsive to recent demand changes.
B. is less responsive to recent demand.
C. places emphasis on the past demand data.
D. is always the most effective weighting scheme.
E. is not a time-series model.

2. Which of the following is (are) not characteristic of the scatter diagram?
A. The independent variable is usually measured on the horizontal (X) axis.
B. The dependent variable is usually measured on the vertical (Y) axis.
C. It is useful to get a quick idea as to whether any relationship exists.
D. It is helpful in determining what is cause and what is effect.
E. None of the above.

3. Daily demand for newspapers for the last 10 days has been as follows: 12, 13, 16, 15, 12, 18, 14, 12, 13, 15. Forecast sales for the next day using a 2-day moving average.
A. 14
B. 13
C. 15
D. 28
E. none of the above

4. Enrollment in a particular class for the last four semesters had been 120, 126, 110, and 130. Develop a forecast of enrollment next semester using exponential smoothing with an alpha = 0.2. Assume that an initial forecast for the first semester was 120 (so the forecast and the actual were the same).
A. 118.96
B. 121.17
C. 130
D. 120
E. none of the above

Solution Preview

A weighted moving average having the early periods more heavily weighted
A. is more responsive to recent demand changes.
B. is less responsive to recent demand. <- Answer; as if more weightage is given to early periods, the response to recent demand gets diminished
C. places emphasis on the past demand data.
D. is always the most effective weighting scheme.
E. is not a ...

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