The effect of different lighting levels on productivity is evaluated using a designed experiment.Two hundred office workers who have the same basic job assignments are randomly selected to participate.Each worker is randomly assigned a different lighting level at his or her desk.Ambient (background)lighting is held constant for all workers.A benchmark of productivity is recorded for each worker.In this study,the sample is best described as:
A) 200 office workers.
B) the different lighting levels.
C) the amount of productivity.
D) all office workers with similar job assignments.

Question

Quizplus · Accepted Answer

The sample in this study is the 200 office workers who have the same basic job assignments and are randomly selected to participate in the experiment. The other variables, such as the lighting levels and productivity, are the factors being manipulated and measured within the sample. Therefore, the best choice is A) 200 office workers.

The Effect of Different Lighting Levels on Productivity Is Evaluated