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.

a. Compute the mean, the variance, and the standard deviation for each group.
b. Is one group of scores noticeably more variable s(more diverse) than the other?

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Older Adults (average age 72) 94738 62845 7 5 266 Younger Adults (average age 31) 79678 67668 97 8 69