Candy packaging Marketing researchers wonder if the color and type of a candy's packaging may influence sales of the candy.
They manufacture test packages for chocolate mints in three colors (white, green, and silver) and three types (box, bag, and roll). Suspecting that sales may depend on a combination of package color and type, the researchers prepare nine different packages, then market them for several weeks in convenience stores in various locations. In this experiment...
a. what are the experimental units?
b. how many factors are there?
c. how many treatments are there?
d. what is the response variable?
Question 2
All airplanes in the United States are inspected annually by the Federal Aviation Administration (FAA).
For each airplane, the variables measured include hours of use since last inspection, type of repairs since last inspection, and structural condition of wings. Identify each of these variables as quantitative or qualitative, the data collection method, and whether or not the data represent a population or a sample.
Examples of the results of sexual selection, a type of natural selection.
Type C killer whales in the Ross Sea. The eye patch slants forward.
Color enhanced X ray of large malignant tumor in the right lung.
Numeric Color-Coding Systems
Researchers and Research Spending, 2009
Coat color in mice