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What is true about independent (within-sample) random sampling?

Select ALL that apply.

A

It is required in all inferential statistical techniques covered in an introductory statistics course.

B

It means that each observation in the population has an equally likely chance of being included in the sample.

C

It means that each observation in the population is not affected by the other measurements in the sample.

D

It does not depend on whether the scores in two samples are related or unrelated.

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