The Quick Change Oil Company has a number of outlets. The numbers of oil changes at...
The Quick Change Oil Company has a number of outlets. The numbers of oil changes at the Oak Street outlet in the past 20 days are as follows:
| 69 | 32 | 49 | 51 | 58 | 53 | 73 | 35 | 88 | 85 |
| 80 | 60 | 87 | 48 | 55 | 46 | 82 | 81 | 64 | 71 |
The data are to be organized into a frequency distribution.
a. How many classes would you recommend?
b. What class interval would you suggest? (Round the final answer to the nearest whole number.)
c. What lower limit would you recommend for the first class?
d. Organize the information into a frequency distribution and determine the relative frequency distribution. (Round the final answers to 2 decimal places.)
| Units | Frequency | Relative frequency |
| 30 to under 42 | ||
| 42 to under 54 | ||
| 54 to under 66 | ||
| 66 to under 78 | ||
| 78 to under 90 | ||
| Total | ||
e. Comment on the shape of the distribution. (Enter the intervals in ascending order.)
The greatest concentration is in classes up to and up to .
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The Quick Change Oil Company has a number of outlets. The
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