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Chapter 11: Q 57 (page 658)
Both sorts of tests are concerned with data that has been cross-classified.
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The number of births per woman in China is down from in . This fertility rate has been attributed to the law passed in restricting births to one per woman. Suppose that a group of students studied whether or not the standard deviation of births per woman was greater than . They asked women across China the number of births they had had. The results are shown in Table. Does the students鈥� survey indicate that the standard deviation is greater than ?
a. Explain why a goodness-of-fit test and a test of independence are generally right-tailed tests.
b. If you did a left-tailed test, what would you be testing?
How many passengers are expected to travel between and miles and purchase second-class tickets?
A six-sided die is rolled times. Fill in the expected frequency column. Then, conduct a hypothesis test to determine if the die is fair. The data in Table are the result of the rolls.
| Face Value | Frequency | Expected Frequency |
| 1 | 15 | |
| 2 | 29 | |
| 3 | 16 | |
| 4 | 15 | |
| 5 | 30 | |
| 6 | 15 |
Use a goodness-of-fit test to determine if high school principals believe that students are absent equally during the week or not.
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