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November 12, 2022

Using samples of students may result in threats to internal validity because the results are not generalizable.

Using samples of students may result in threats to internal validity because the results are not generalizable.

a- true

b- false

2- The difference between a classic cohort study and a randomized controlled trial is the selection of the study population

a- true

b- false

3- Randomly allocating individuals to groups to intervention or control groups is known as randomization.

a- true

b- false

4- Which of the following is a limitation of an RCT?

a- Does not protect against confounding

b- Does not provide good causality evidence

c- Cannot always randomly assign a treatment

d- All of above

5- When is an RCT study design appropriate?

a- Exposure is a modifiable factor

b- Intervention outweighs potential risks

c- Intervention is significantly different from the control

d- All of above

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