The data range from 12 to 87. Using a class width of 10, the number of classes needed is:

  1. 75
  2. 10
  3. 6
  4. 8
Answer

D) 8

The values 12 to 87 cover 87 - 12 + 1 = 76 whole numbers; 7610 = 7.6, rounded up to 8 classes. SLO M-09-C-01 · Knowledge

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