Statistics
Thunder
Question
- A company has 70 employees whose salaries are summarized in the frequency distribution below.
|
Number of Employees |
| 5,001–10,000 | 8 |
| 10,001–15,000 | 12 |
| 15,001–20,000 | 20 |
| 20,001–25,000 | 17 |
| 25,001–30,000 | 13 |
- Find the standard deviation.
- Find the variance.
- The wait times (in seconds) for fast food service at two burger companies were recorded for quality assurance. Using the data below, find the following for each sample.
- Range
- Standard deviation
- Variance
Lastly, compare the two sets of results.
| Company | Wait times in seconds | |||||||
| Big Burger Company | 105 | 67 | 78 | 120 | 175 | 115 | 120 | 59 |
| The Cheesy Burger | 133 | 124 | 200 | 79 | 101 | 147 | 118 | 125 |
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