Exam 18: Time Series and Forecasting

For a time series beginning with 1991 and extending up to 2010,which year would be coded with a 1 when using the coded method?

For the third quarter,the sales are 2,500 units; the seasonal index for the quarter is 0.95. What are the deseasonalized sales for the quarter?

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 merchants in Dallas,Texas,suffered flood damage in May 2003. Stores were closed for remodeling nearly two months. What is this type of variation in sales called?

To calculate monthly typical seasonal indexes,how many periods are included in the ratio-to-moving-average method?

Given a linear time-series trend = 5.2 + 3.1t,what is the forecast for 2010 if the time series started in 2003?

If the trend equation is = 10 + 100t,the forecasted value increases 100 units for the next time period,t.

Given the following trend equation based on five years of annual sales (in millions of dollars),beginning in 2005: = 4.53 + 1.54t The estimated value for 2008 is ________.

Because a ski resort does most of its business in the winter,what is the major source of variation that affects sales?

The following linear trend equation was developed for the annual sales of the Jordan Manufacturing Company. = 500 + 60t (in thousand $). At what rate are sales increasing?

For the following time series,you are given the 3-year moving total. The three-year moving average for 2004 is ________.

If a quarterly seasonal index is 0.56,it implies that ________.

Consider a three-year moving average. The weights given to each period are ________.

In the final step,using the ratio-to-moving-average method,the total of the 12 modified means should theoretically be equal to 12.00 because the average of the 12 months is designated as 1.00.

What time-series component was exemplified during the 1980s when the American economy enjoyed a period of prosperity?

Given the trend equation, = 25 + 0.6t (base year = 2006),what would be the forecast value for 2010?

If the least squares equation for sales data going from 2004 to 2008 is = 10 + 1.3t (in million $),what is the value of t and the forecast for 2010?

An analysis of past seasonal fluctuations can be helpful in planning production for items such as toys,dolls,Easter eggs,and other holiday-oriented goods.

To calculate monthly typical seasonal indexes,after computing the ratio-to-moving averages,the averages must be ________.

To calculate monthly typical seasonal indexes,after computing the ratio-to-moving averages,the averages must be ________.