رد: واجب الدكتور خالد سيد تحليل كمي
شكررررا جزاكم الله خيير
معليه ساعدوني في حل دي الاسئلة لو سمحتو سؤال 13 - 16 - 17 - 18 - 19 - 37
13. Using a naive forecasting method, the forecast for next week’s sales volume equals
a. the most recent week’s sales volume
b. the most recent week’s forecast
c. the average of the last four weeks’ sales volumes
d. next week’s production volume
16. Which of the following exponential smoothing constant values puts the same weight on the most recent time series value as does a 5-period moving average?
a. = .2
b. = .25
c. = .75
d. = .8
17. All of the following are true about a cyclical pattern except
a. It is often due to multiyear business cycles.
b. It is often combined with long-term trend patterns and called trend-cycle patterns.
c. It usually is easier to forecast than a seasonal pattern due to less variability.
d. It is an alternating sequence of data points above and below the trend line.
18. All of the following are true about a stationary time series except
a. Its statistical properties are independent of time.
b. A plot of the series will always exhibit a horizontal pattern.
c. The process generating the data has a constant mean
d. There is no variability in the time series over time.
19. In situations where you need to compare forecasting methods for different time periods, the most appropriate accuracy measure is
a. MSE
b. MAPE
c. MAE
d. ME
37. The dual price for a constraint that compares funds used with funds available is .058. This means that
a. the cost of additional funds is 5.8%.
b. if more funds can be obtained at a rate of 5.5%, some should be.
c. no more funds are needed.
d. the objective was to minimize.
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