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Chapter 13: Q.28 (page 765)
What are the Sum of Squares and Mean Squares Factors?
The value of and .
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Eliminate one magazine type that you now feel has a mean length different from the others. Redo the hypothesis test, testing that the remaining three means are statistically the same. Use a new solution sheet. Based on this test, are the mean lengths for the remaining three magazines statistically the same?
Are the mean numbers of daily visitors to a ski resort the same for the three types of snow conditions? Suppose that Table 13.27 shows the results of a study.
Assume that all distributions are normal, the four population standard deviations are approximately the same, and the data were collected independently and randomly. Use a level of significance of .
Girls from four different soccer teams are to be tested for mean goals scored per game. The entries in the table are the goals per game for the different teams.
| Team 1 | Team 2 | Team 3 | Team 4 |
| 1 | 2 | 0 | 3 |
| 2 | 3 | 0 | 4 |
| 0 | 2 | 1 | 4 |
| 3 | 4 | 1 | 3 |
| 2 | 4 | 0 | 2 |
What is?
Suppose a group is interested in determining whether teenagers obtain their driver's licenses at approximately the same average age across the country. Suppose that the following data are randomly collected from five teenagers in each region of the country. The numbers represent the age at which teenagers obtained their driver's licenses.
a) Decision: _____
b) Conclusion: _____
At the significance level, is there a difference in the mean jump heights among the teams?
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