Exam 16: Time Series and Forecasting

The table below shows the sales for a plastics manufacturer recorded over the past year. The seasonal indexes for each quarter are also provided. To track the trend for these four quarters, use the indexes to deseasonalize the sales data What is the deseasonalized sales value for quarter 1?

In a time series, economic periods of prosperity followed by recession are described as:

The forecast for the third quarter is 2,000 units; the seasonal index for the quarter is 0.79. What are the seasonally adjusted sales for the quarter?

The forecast for the third quarter is 1,000 units; the seasonal index for the quarter is 1.10. What are the seasonally adjusted sales for the quarter?

A resort hotel performed a quarterly time series analysis for demands over the last five years (periods 1 through 20). The analysis resulted in the following trend equation and seasonal indexes: Ŷ = 1000 + 150t Based on the seasonal indexes, which quarter is expected to have 15% more demand than predicted by the trend line?

The Durbin-Watson statistic is used to test for correlated residuals.

What is the logarithmic transformation for the equation: Ŷ = a + bt?

The Durbin-Watson statistic is used to analyze

Product sales since 1999 are: The least squares trend equation is given as Ŷ = 265.12 - 21.18t, where t is set equal to one for 1999. What are the predicted sales for 2009?

A graph of a deseasonalized time series does NOT show ________.

For the trend equation, log Ŷ = log (a) + log (b t), the time series is _____.

The table below shows the sales for a resort hotel recorded over the past year. The seasonal indexes for each quarter are also provided. To track the trend for these four quarters, use the indexes to deseasonalize the sales data What is the deseasonalized sales value for quarter 1?

Define autocorrelation.

If a quarterly seasonal index is 0.56, it implies that

What is the long-term behavior of a variable over an extended period of time called?

For the third quarter, the sales are 2,500 units; the seasonal index for the quarter is 1.20. What are the deseasonalized sales for the quarter?

Product sales since 2001 are: The least squares trend equation is given as Ŷ = 100 + 28t, where t is set equal to one for 2001. What were the predicted sales in 2006?

To study the trend and cycle components of a time series, typical seasonal indexes are used to compute ____.

Which one of the following is not a component of a time series?

For the third quarter, the sales are 1,500 units; the seasonal index for the quarter is 0.90. What are the deseasonalized sales for the quarter?