1. 65.2% of the respondents in a South Jersey survey said they would like to stop new residential development in their own community. 34.6% disagreed. 467 respondents answered the question. What is the margin of error for this item?
2. A South Jersey survey had 272 female respondents and 178 male respondents. What is the margin of error for statistics about the responses of the female respondents?
3. A South Jersey survey had 272 female respondents and 178 male respondents. What is the margin of error for statistics about the responses of the male respondents?
4. A South Jersey survey had 272 female respondents and 178 male respondents. What is the margin of error for statistics about the responses of all the respondents?
5. A South Jersey survey had 350 white respondents and 74 black respondents. 58.9% of the white respondents thought that protecting open space was very important. What is the margin of error for this percentage?
6. In the same survey, 29.7% of the black respondents thought that protecting open space was very important. What is the margin of error for this percentage?
7. Five students in a Methods of Research Class had the following scores on the midterm: 78%, 65%, 88%, 91%, 82%. What was the mean score for this group?
8. What was the median score for this group?
9. What was the standard deviation of the scores for this group?
10. Prepare a frequency distribution for these scores.
11. A South Jersey survey needed to obtain a margin of error if 4% for statistics about residents of each of the three regions of South Jersey. How large a sample would be needed?
12. What type of sample would this be: a. simple random b. stratified random c. cluster d. quota e. snowball
13. The probability that the parameter actually will fall within the range defined by the margin of error is known as the: a. confidence level b. confidence interval
14. Stratified sampling: a. is a form of random sampling b. is a form of convenience sampling.
15. A two-step process in which aggregates or groups of individuals are sampled, then the samples of individuals are selected from within each aggregate is called: a. simple random sampling b. stratified sampling c. quota sampling d. cluster sampling e. snowball sampling