c. population
d. stratified e. nonquota
Scenario 5.2
Use the following to answer the questions.
GE Transportation Corp produces locomotive engines for sale in countries around the
world. After looking at the total market for locomotive engines, the company found that
various rail lines wanted different types of engines. Major rail lines in the U.S. and
South America wanted engines to haul heavy freight. Rail lines in Sweden and
Germany were interested in a cleaner, greener locomotive engine. Rail lines operated by
several Eastern European countries wanted locomotive engines for running short
distances between cities in their own country. GE Transportation is currently
manufacturing its GE 4400 for heavy freight, its Hybrid Eco-Engine, and its Dash 9,
suited for shortline transport.
If a GE Transportation researcher analyzes monthly sales data for a four-year time
frame, looking for periodic fluctuations, the researcher is doing a analysis.
a. trend
b. seasonal
c. cycle
d. random factor
e. regression