For the Hawkins Company, the monthly percentages of all shipments that were received on
time over the past 12 months are 80, 82, 84, 83, 83, 84, 85, 84, 82, 83, 84, and 83.
Graph this time series. Does a linear trend appear?
Compare a three-month moving average forecast with an exponential
smoothing forecast for
= 0.2. Which provides the better forecasts?
What is the forecast for next month?
Alabama building contracts for a 12-month period (in millions of dollars) are 240, 350, 230,
260, 280, 320, 220, 310, 240, 310, 240, and 230.
Compare a three-month moving average forecast with an
exponential smoothing forecast using
= 0.2. Which provides the better
b. What is the forecast for next month?
TV ratings provided by Nielsen Media Research show the percentage of TV-owning households
tuned in to a particular program. The following data show the rating for the top-
rated TV show of each season, from 1987-1988 to 2000-2001