Ethnicity Number of Cases Percentage of total county population Number of cases expected (round to 2 decimal places White 2229 42.9% 1748.18 Hispanic 1157 26.7% 1088.03 ? Black/African-American 457 2.6% 0.106 ? Asian, Pacific islander 232 27.8% 1132.85 ? Total 4075 100% 3969.166 ?   The above data are real. The cumulative number of AIDS cases reported for Santa Clara County is broken down by ethnicity as listed above.   a. sketch a graph of the situation. Label and scale the horizontal axis. mark the mean and test statistic. Shade in the region corresponding to the p-value. (p-value = 0.0000)

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.