Problem 115 of 7
Improve flawed study design surveying only easily accessible individuals.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
add random sampling, random assignment, control, or blinding where appropriate.
Hidden until you reveal it.
Add random sampling, random assignment, control, or blinding where appropriate.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Identify the design weakness.
2. Choose random sampling, random assignment, control, or blinding as appropriate.
3. Explain how the improvement addresses the weakness.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Adding random assignment to a survey when the problem is sampling bias only.