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.
White tiger in water at the Singapore Zoo
Two devils, one without any white markings. Around 16% of wild devils have no markings.
What cause the white spot area on throat?