Which of the following is an advantage of LED lights over incandescent lights?
a. they use more electricity than incandescent lights for the same light output
b. they generate very little heat, so they can be housed in plastic rather than metal
c. they can produce both directional and nondirectional light beams
d. they can run on both batteries and electric current
e. they don't require color temperature adjustment
Question 2
There are five major limitations to all ratings methodologies as presently utilized. Which of the following is NOT a limitation of ratings in general?
a. Omitting bars, hospitals, and other public viewing locations from the sample
b. Unknown representativeness as a result of low cooperation rates
c. Having standard error because rating samples are drawn from the general population
d. Lack of agreement on what viewing or listening is, leading to some counting oddities
e. Weighting subsets of respondents so that the sample matches the general population
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