Psychology Multiple Choice Help?

Stuck on a couple questions. Any help?

9. For which of the following distributions of scores would the median most clearly be a more appropriate measure of central tendency than the mean?

A. 16, 28, 4, 8, 24

B. 9, 6, 9, 12, 9

C. 8, 9, 12, 10, 16

D. 6, 18, 4, 5, 2

17. A correlation coefficient is a statistical measure of the

A. difference between the highest and lowest scores in a distribution.

B. extent to which two factors vary together.

C. statistical significance of a difference between two sample means.

D. frequency of scores at each level of some measure.

10. The average scores of two samples taken from the same population are most likely to differ if

A. the samples are both small.

B. the standard deviations of the samples are both small.

C. the samples differ from each other in size.

D. the sample means are both similar to the sample medians.