Question: To choose a sample of 12 students from a statistics class of 36 students, which type of sample (simple random, systematic, cluster, convenience) is each

To choose a sample of 12 students from a statistics class of 36 students, which type of sample (simple random, systematic, cluster, convenience) is each of these?
a. Picking every student who was wearing blue that day.
b. Using Excel's = RANDBETWEEN (1,36) to choose students from the class list.
c. Selecting every 3rd student starting from a randomly chosen position.

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