1. The sampling frame is most similar to the a. population. b. sample. c. participants. d. elements 2. We use the results obtained from a sample to a. generalize to the population. b. stratify the sample. c. select convenience samples. d. identify the subjects used in the study 3. It is important to have a complete description of the sample to be able to a. stratify the sample. b. describe the population. c. generalize the results d. select informative subjects. 4. Probability sampling is to systematic sampling as nonprobability sampling is to a. stratified sampling. b. proportional sampling. c. disproportional sampling. d. purposive sampling. 5. Systematic sampling is preferred when a.. stratified sampling is not possible. b. certain subjects need to be selected because of their position or special knowledge. c. it is not possible to number all members of the population. d. there is paiodicity in a list of the population 6. A researcher decides to select a sample by taking simple random samples from three subgroups that have been identified from the population. What type of sampling was used? a. Proportional b. Cluster. cd. Stratified