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Dr. Jon planned to reward his class with candy because everyone got a A on the test. He surveyed every 4th student that entered his class to find out which candy he should buy . Which type of sample did he use?

User Natalie
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This is an example of a systematic sample.

Dr. Jon developed a system in order to get a random sample. His plan was to survey the 4th student that entered his classroom.
User Gokhan
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