(Answered) What kind of sample in each of the following situations

Statistics

What kind of sample? In each of the following situations, describe the sample as an SRS, a stratified random sample, a multistage sample, or a voluntary response sample. Explain your answers.

(a) There are 7 sections of an introductory statistics course. A random sample of 3 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.

(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.

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