value: 8.00 points The Quick Change Oil Company has a number of outlets in the m

Question

value: 8.00 points 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 7256 70 62 66 80 9479 63 73 71 85 The data are to be organized into a frequency distribution er cel Data File a. How many classes would you recommend? Number of classes d. Organize the number of oil changes into a frequency distribution. (Round relative frequency answers to 2 decimal places.) Relative frequency 50 up to up to up to up to up to 60 Total

Explanation / Answer

(A)

Minimum: 51

Maximum: 98

Range: maximum - minimum = 98 -51 = 47

Since range is approximatey 50 so number of classes should be 5 with class width 10.

Answer: number of classes: 5

(B)

Classes Frequency, f Relative frequency, f/20 50-60 4 0.20 60-70 5 0.25 70-80 6 0.30 80-90 2 0.10 90-100 3 0.15 Total 20 1

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