In each of the following situations, identify the sample as either an srs, a stratified random sample, a multistage random sample, or a voluntary response sample. explain your answers. a) there are seven sections of an introductory statistics course. a random sample of three sections is chosen, and then random samples of 8 students from each of these sections are chosen. b) a student organization has 55 members. a table of random numbers is used to select a sample of 5. c) an online poll asks people who visit this site to choose their favorite television show. d) separate random samples of male and female first-year college students in an introductory psychology course are selected to receive a one-week alternative instructional method.