A Recent Study in the Restaurant Business Determined That the Mean

Multiple Choice

A recent study in the restaurant business determined that the mean tips for male waiters per hour of work are $6.78 with a standard deviation of $2.11. The mean tips per hour for female waiters are $7.86 with a standard deviation of $2.20. Based on this information, which of the following statements do we know to be true?

A) The distribution of tips for both males and females is right-skewed.
B) The variation in tips received by females is more variable than males.
C) The median tips for females exceeds that of males.
D) On a relative basis, males have more variation in tips per hour than do females.