Answer:
B. 13.1
Explanation:
To find the range of a set of data, first, order the numbers from least to greatest:
2.8, 4.3, 7.9, 9.6, 10.3, 11.5, 12.8, 12.9, 13.6, 15.3, 15.9
Next, find the least and greatest number:
2.8, 4.3, 7.9, 9.6, 10.3, 11.5, 12.8, 12.9, 13.6, 15.3, 15.9
Subtract the least number from the greatest number:
15.9 - 2.8 = 13.1
B. 13.1 is your answer.
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