A Limitation of the Interrupted Time-Series Design Is That Changes

question 14

Multiple Choice

A limitation of the interrupted time-series design is that changes in the dependent variable may be due not to the intervention,but to:

• A)a confounding external event.
• B)"seasonal" changes in the dependent variable.
• C)lack of a randomly assigned control group.
• D)both 'a' and 'b'

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