Question

Within a population, the differences that exist from

one person to another are often called diversity.

Researchers comparing cognitive skills for younger

adults and older adults, typically find greater differences (greater diversity) in the older

population (Morse, 1993) Following are typical data showing problem-solving scores

for two groups of participants.

____________________________

Older Adults Younger Adults

(average age 72) (average age 31)

_____________________________

9 4 7 3 8 7 9 6 7 8

6 2 8 4 5 6 7 6 6 8

7 5 2 6 6 9 7 8 6 9

____________________________

a. Compute the mean, the variance, and the standard

deviation for each group.

b. Is one group of scores noticeably more variable (more diverse)

than the other?

Answer 1