Which of the following are true?
I. There is always a treatment in an experiment
II. An...
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Mathematics, 28.05.2020 20:04, 375025
Which of the following are true?
I. There is always a treatment in an experiment
II. An observational study is one type of experiment
III. Sample surveys are experiments
O I only
Oll only
O II and Ill only
O I and III only
![answer](/tpl/images/cats/otvet.png)
Answers: 1
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