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Statistical Techniques in Business and Economics | 15th Edition | ISBN: 9780073401805 | Authors: Douglas Lind, William Marchal, Samuel Wathen
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The Quick Change Oil Company has a number of outlets in the metropolitan Seattle area

Chapter 0, Problem 12

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QUESTION:

The Quick Change Oil Company has a number of outlets in the metropolitan Seattle area. The daily number of oil changes at the Oak Street outlet in the past 20 days are: 65 98 55 62 79 59 51 90 72 56 70 62 66 80 94 79 63 73 71 85 The data are to be organized into a frequency distribution. a. How many classes would you recommend? b. What class interval would you suggest?

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QUESTION:

The Quick Change Oil Company has a number of outlets in the metropolitan Seattle area. The daily number of oil changes at the Oak Street outlet in the past 20 days are: 65 98 55 62 79 59 51 90 72 56 70 62 66 80 94 79 63 73 71 85 The data are to be organized into a frequency distribution. a. How many classes would you recommend? b. What class interval would you suggest?

ANSWER:

Step 1 of 6

(a) If we consider  is the number of classes and  is the number of observations, then for class intervals, select the smallest  such that

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