Question: If the conditions for randomized assignment cannot be met, there are two concerns for a researcher evaluating a program without random assignment. One is that

If the conditions for randomized assignment cannot be met, there are two concerns for a researcher evaluating a program without random assignment. One is that the ability to detect differences in outcomes may be reduced and the other is: a. the number of cases may not be adequate. b. the time period for the implementation may be too short. c. treatment may have been implemented irregularly. d. treatment and control groups may be different

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