Exam 9: Forecasting Techniques

Use the data given below to answer the following question(s). The table provided below gives the sales details of the number of android smart phones at an electronic retail store for the past 6 weeks. The time series appears to be relatively stable, without trend, seasonal, or cyclical effects. (Hint: Optimize α value in 0.1 increments) Week Units sold 1 88 2 44 3 54 4 65 5 72 6 85 -What is the formula used to calculate the value of at in the linear trend equation Ft+k = at + btk while using double exponential smoothing?

In forecasting, what is an index?

The data for the number of hand-held gaming devices sold for the past 5 weeks are 15 units, 20 units, 25 units, 30 units, and 17 units respectively. The time series appears to be relatively stable, without trend, seasonal, or cyclical effects; thus, a moving average model would be appropriate. Setting k = 3 the three-period moving average forecast for week 6 is .