Concept explainers
Use the following information to answer the next nine exercises: The following data are real. The cumulative number of
AIDS cases reported for Santa Clara County is broken down by ethnicity as in Table 11.29.
Ethnicity | Number of Cases |
White | 2,229 |
Hispanic | 1,157 |
Black/African-American | 457 |
Asian, Pacific Islander | 232 |
Total = 4075 |
The percentage of each ethnic group in Santa Clara County is as in Table 11.30.
Ethnicity | Percentage of total county population | Number expected (round to two decimal places) |
White | 42.9% | 1748.18 |
Hispanic | 26.7% | |
Black/African-American | 2.6% | |
Asian, Pacific Islander | 27.8% | |
Total=100% |
Graph the situation. Label and scale the horizontal axis. Mark the mean and test statistic. Shade in the region
corresponding to the p-value.
Figure 11.14
Let a = 0.05
Decision: ________________
Reason for the Decision: ________________
Conclusion (write out in complete sentences): ________________
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Introductory Statistics
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