Mathematics, 19.06.2020 05:57 sabel1234

10a ) Which of the following is not a characteristic of both surveys and observational studies? A.
The researcher does not control or change the population.
B.
The researcher exercises direct control over at least one variable.
C.
Data are collected about a population.
D.
Results are not used to prove cause and effect.

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10a ) Which of the following is not a characteristic of both surveys and observational studies? A.<...