One factor that has limited the growth of digital billboards is that ____.
a. the technology has not been perfected
b. consumers do not respond well to them
c. they require constant adjustment
d. only very short messages can be used
e. they are expensive to install
Question 2
Failure to include some units, or entire sections, of the defined survey population in the actual operational sampling frame represents
a. noncoverage error.
b. nonresponse error.
c. sampling error.
d. random error.
e. observation error.