Mathematics, 10.12.2020 06:40 palomaresmitchelle
Which of the following distinguishes an observational study from a randomized experiment?
In an observational study volunteers are always used, whereas in a randomized experiment a random sample is always taken from the population.
In an observational study volunteers are always used, whereas in a randomized experiment a random sample is always taken from the population.
A
In an observational study a random sample is always taken from the population, whereas in a randomized experiment volunteers are always used.
In an observational study a random sample is always taken from the population, whereas in a randomized experiment volunteers are always used.
B
In an observational study treatments are not randomly assigned, whereas in a randomized experiment treatments are randomly assigned.
In an observational study treatments are not randomly assigned, whereas in a randomized experiment treatments are randomly assigned.
C
In an observational study a control group is never used, whereas in a randomized experiment a control group is always used.
In an observational study a control group is never used, whereas in a randomized experiment a control group is always used.
D
An observational study can be double-blind, whereas a randomized experiment can only be single-blind because the experimenter determines who is randomly assigned to each treatment.
Answers: 3
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Which of the following distinguishes an observational study from a randomized experiment?
In an obs...
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