c If we use a class interval of 25 feet and begin with a lower limit of 300

C if we use a class interval of 25 feet and begin

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c. If we use a class interval of 25 feet and begin with a lower limit of 300 feet, eight classes would be necessary. A class interval of 30 feet beginning with 300 feet is also reasonable. This alternative requires only seven classes. 2–4 a. 23 b. 28.75%, found by (23/80) 100 c. 7.5%, found by (6/80) 100 2–5 a. 20 15 10 5 0 2 Imports ($ millions) Number of Suppliers 6 13 20 10 1 5 8 11 14 17
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