Describing Multiple Samples 7.SP.A.2 Practice Question Grade 7 Mathematics - Skill Builder + IAR Rehearsal

Grade 7 Mathematics - Skill Builder + IAR Rehearsal Describing Multiple Samples

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John comes up with the following methods for generating unbiased samples from shoppers at a mall.

I. Ask random strangers in the mall

II. Always go to the mall at the same time of day

III. Go to different places in the mall

IV. Don't ask questions the same way to different people

Which of these techniques represents the best way of generating an unbiased sample?


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