A psychologist conducts a survey of job satisfaction among laborers and white-collar workers using a rating scale on which 1 indicates low satisfaction and 10 indicates high satisfaction.
The findings are that laborers have a mean job satisfaction score of 4 and a variance of 1; white-collar workers have a mean job satisfaction score of 7 and a variance of 10. Which statement most completely describes the meaning of these numbers?
A) White-collar workers are more 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 2
If someone told you that a distribution showed a floor effect, you would surmise that it is
A) symmetrical.
B) positively skewed.
C) negatively skewed.
D) rectangular.
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