For each problem, use a solution sheet to solve the hypothesis test problem. Go to the reference for the chi-square solution sheet. Round expected frequency to two decimal places.
The marital status distribution of the population of U.S. men, ages 15 and older, is as shown in the table.
| Marital Status | Percent | Expected Frequency |
| never married | 31.3 | |
| married | 56.1 | |
| widowed | 2.5 | |
| divorced/separated | 10.1 |
Suppose that a random sample of 400 U.S. young adults, 18 to 24 years old, yielded the following frequency distribution. We are interested in whether this age group fits the distribution of the U.S. adult population. Calculate the frequency one would expect when surveying 400 people. Fill in the table, rounding to two decimal places.
| Marital Status | Frequency |
| never married | 140 |
| married | 238 |
| widowed | 2 |
| divorced/separated | 20 |
OpenStax Introductory Statistics 2e, 11.2 Goodness-of-Fit Test, exercise 28