Author:
Christine Farr

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Question 1 (3 points)A linear trend means that the time series variable changes by aQuestion 1 options:constant percentage each time periodconstant amount each time periodnegative amount each time periodpositive amount each time periodSaveQuestion 2 (3 points)The forecast error is the difference betweenQuestion 2 options:the average value and the expected value of the response variablethis period’s value and the next period’s valuethe explanatory variable value and the response variable valuethe actual value and the forecastSaveQuestion 3 (3 points)The data below represents sales, in units, for a particular product. If you were to use the moving averagemethod with a span of 4 periods, what would be your forecast for period 5?Question 3 options:10590110100SaveQuestion 4 (3 points)Suppose that a simple exponential smoothing model is used (with= 0.30) to forecast monthlysandwich sales at a local sandwich shop. After June’s demand is observed at 1520 sandwiches, theforecasted demand for June is 1600 sandwiches. What would be the forecasted demand for July?Question 4 options:1520154415501576SaveQuestion 5 (3 points)Which of the following is not one of the summary measures for forecast errors that is commonly used?Question 5 options:RMSE (root mean square error)MAPE (mean absolute percentage error)MFE (mean forecast error)MAE (mean absolute error)SaveQuestion 6 (3 points)When using the moving average method, you must select ______ which represent(s) the number of terms in the moving average.Question 6 options:a spana smoothing constantthe explanatory variablesan alpha valueSaveQuestion 7 (3 points)Holt’s model differs from simple exponential smoothing in that it includes a term for:Question 7 options:residualsseasonalitycyclical fluctationstrendSaveQuestion 8 (2 points)A moving average is the average of the observations in the past few periods, where the number of terms in the average is the span.Question 8 options:TrueFalseSaveQuestion 9 (2 points)The cyclical component of a time series measures the overall general directional movement over a long period of time.Question 9 options:TrueFalseSaveQuestion 10 (2 points)If the observations of a time series increase or decrease regularly through time, we say that the time series has a random (or noise) component.Question 10 options:TrueFalseSaveQuestion 11 (2 points)A trend component of a time series is a longterm direction exhibited by a series.Question 11 options:TrueFalseSave

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