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AP® Statistics

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Moderate

Data Gathering

APSTAT-4LKFKZ

Which of the following statements are true in regards to gathering data?

I. A census attempts to contact every individual from the sample.

II. An observational study is different from an experiment in that a treatment is imposed in an observational study.

III. A matched pairs experiment can reduce variability.

A

I only.

B

II only.

C

III only.

D

II and III only.

E

I and III only.