Mathematics, 24.05.2020 20:57, saintsfan2004

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

Answers: 2

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Which of the following is not a characteristic of both surveys and
observational studies?