1. In a sample of 350 people, 100 are white, 50 are black and the rest are Hispanic. What percentage of the sample is Hispanic? 2. In a sample of 350 people, 100 are white, 50 are black and the rest are Hispanic. What proportion of the sample is Hispanic? 3. What is the median, mode, sample size, and mean for the following scores: 8, 10, 2, 8, 12, 13, 7?

4. Identify the independent and the dependent variable, as well as the unit of analysis, in the following hypothesis: Documented immigrants in the United States are less likely than undocumented immigrants to use and depend on social services (e.g., welfare, food stamps, etc). 5. Identify the independent and the dependent variable, as well as the unit of analysis, in the following hypothesis: On average, the annual household income of female headed households is about 25 percent less than the annual household income of married couple households. 7. If in a certain sample, about 42 percent of respondents reported that they did not attend sports events regularly. What proportion of respondents did not attend sports events regularly? 8. In a sample of 660 respondents, men account for 45% of all observations in the sample. What is the total number of women in the sample?