A researcher surveys job satisfaction among laborers and white-collar workers. (Job satisfaction is rated on a scale from 1 = low satisfaction to 10 = high satisfaction.)Results show that laborers have a mean job satisfaction score of 3 and a variance of 1; white-collar workers have a mean job satisfaction rating of 7 and a variance of 10. Which statement best describes what these numbers mean?
A)White-collar workers are less satisfied than laborers.
B)White-collar workers and laborers are about equally satisfied.
C)Laborers generally are less satisfied than white-collar workers, but laborers are just as likely to be highly satisfied as white-collar workers are to be highly dissatisfied.
D)Laborers are less satisfied than white-collar workers and most laborers are about equally dissatisfied while there is more variation in the satisfaction of white-collar workers.

Question

Quizplus · Accepted Answer

The mean job satisfaction score for white-collar workers (7) is higher than that of laborers (3), indicating that, on average, white-collar workers are more satisfied with their job than laborers. Additionally, the variance of job satisfaction scores for white-collar workers (10) is higher than that for laborers (1), suggesting that there is more variation in job satisfaction among white-collar workers. Therefore, D is the best choice, which states that laborers are generally less satisfied than white-collar workers, and there is more variation in satisfaction among white-collar workers.

A Researcher Surveys Job Satisfaction Among Laborers and White-Collar Workers