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 is the best interpretation of these numbers?
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.
Answer: D
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