# Chapter 12 - Data Analysis and Probability - 12-3 Measures of Central Tendency and Dispersion - Practice and Problem-Solving Exercises - Page 730: 17

Set C: mean = 6.7, range = 3.8 Set D: mean = 9.025, range = 28.3

#### Work Step by Step

To find the mean, we add up all of the values and divide by the total number of values. Mean C: $\frac{4.5+7.1+8.3+6.9}{4} = 6.7$ Mean D: $\frac{2.1+29.5+1.2+3.3}{4} = 9.025$ To find the range, we subtract the smallest term from the largest term. Range C: $8.3-4.5 = 3.8$ Range D: $29.5-1.2 = 28.3$ The mean and range of Set D are greater than the mean and range of Set C.

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