Exam 14: Forecasting

The manufacturer developed and tested a questionnaire,designed to assist them in gauging the level of acceptance for their new product,and identified a representative sample as part of their:

Which of the following statements regarding time-series methods is FALSE?

Table 14.1 The Agricultural Extension Agent's Office has tracked fertilizer application and crop yields for a variety of chickpea and has recorded the data shown in the following table.Their staff statistician developed the regression model and computed the performance statistics displayed below the data. -Use the information provided in Table 14.1.The value of Bushels when Fertilizer is 60 is:

Table 14.3 Columbia Appliance sells and delivers appliances in the Columbia,South Carolina area.The Operations and Supply Chain Manager wants to be able to predict the delivery crew's hours for easier scheduling.The delivery crew,consisting of a truck and two workers,must load the truck each day and then drive the truck to various locations to deliver appliances.Variables each day include miles driven and the number of deliveries made.The manager has collected data for the past five weeks,and has recorded the following average daily crew hours worked,miles driven and deliveries made: The manager uses the multiple regression model in POM for Windows and obtains the following results: -Use the information provided in Table 14.3.What is the estimated work time for the crew if the schedule that day calls for 85 driving miles and 6 deliveries?

Draw a curve that represents four out of the five demand patterns for time series as discussed in this chapter.Clearly label both dependent and independent axes and the salient features of your graph that demonstrate your chosen patterns.Select a product or service and discuss what influences might cause it to exhibit each of these patterns.

Time-series analysis is a statistical approach that relies heavily on historical demand data to project the future size of demand.

A forecasting system that brings the manufacturer and its customers together to provide input for forecasting is a(n):

Table 14.5 The manager of a pizza shop must forecast weekly demand for special pizzas so that he can order pizza shells weekly.Recent demand has been: -Use the information from Table 14.5.If a four-week weighted moving average were used,what would be the forecast for week 7? (The weights are 0.60,0.30,0.07,and 0.03 with 0.60 applied to the most recent period and 0.03 applied to the oldest period. )

The standard error of the estimate measures how closely the data on the independent variable cluster around the regression line.

Which one of the following statements is TRUE?

Table 14.1 The Agricultural Extension Agent's Office has tracked fertilizer application and crop yields for a variety of chickpea and has recorded the data shown in the following table.Their staff statistician developed the regression model and computed the performance statistics displayed below the data. -Use the information provided in Table 14.1.What percent in the variation of the variable Bushels is explained by the value of the variable Fertilizer?

Professor Willis noted that the popularity of his office hours mysteriously rose in the middle and the end of each semester,falling off to virtually no visitors throughout the rest of the year.The demand pattern at work is:

Table 14.1 The Agricultural Extension Agent's Office has tracked fertilizer application and crop yields for a variety of chickpea and has recorded the data shown in the following table.Their staff statistician developed the regression model and computed the performance statistics displayed below the data. -Use the information provided in Table 14.1.The value of Fertilizer required to generate 100 bushels yield must be:

Ten months of data and the forecasts for those same periods are in the table below.Use mean bias,MAD,and MAPE to analyze the accuracy of the forecasts.

________ are assumed to "cause" the results that a forecaster wishes to predict.

Combination forecasting is most effective when the techniques being combined contribute different kinds of information to the forecasting process.

Technological forecasting is an application of executive opinion in light of the difficulties in keeping abreast of the latest advances in technology.

Table 14.13 The manager of a pizza shop must forecast weekly demand for special pizzas so that he can order pizza shells weekly.Recent demand has been: -Use the information from Table 14.13.Using a three-week simple moving average,what is the forecast for week 7?

Table 14.13 The manager of a pizza shop must forecast weekly demand for special pizzas so that he can order pizza shells weekly.Recent demand has been: -Use the information from Table 14.13.The pizza shop manager believes that a combination forecast might improve her ability to predict future demand,and thus improve keeping fresh ingredients on hand.She decides to use the 3-week simple moving average and 3-week weighted moving average (problems # 125 and 126),giving them equal weight.What is her forecast for week #7?

With the multiplicative seasonal method of forecasting: