The expected percentage of the number of pets students have in their homes is distributed (this is the given distribution for the student population of the United States) as in the table.
| Number of pets | Percent |
| 0 | 18 |
| 1 | 25 |
| 2 | 30 |
| 3 | 18 |
| 4+ | 9 |
A random sample of 1,000 students from the Eastern United States resulted in the data in the table.
| Number of pets | Frequency |
| 0 | 210 |
| 1 | 240 |
| 2 | 320 |
| 3 | 140 |
| 4+ | 90 |
At the 1% significance level, does it appear that the distribution “number of pets” of students in the Eastern United States is different from the distribution for the United States student population as a whole?
OpenStax Introductory Business Statistics 2e, 11.3 Goodness-of-Fit Test, exercise 7