Interrupted time series designs are useful when
A) forming a control group is not feasible
B) subjects can be measured periodically with the same instrument
C) the experimental treatment is not a naturally occurring event
D) both a and b

Question

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The Answer of Interrupted time series designs are useful when
A) forming a control group is not feasible
B) subjects can be measured periodically with the same instrument
C) the experimental treatment is not a naturally occurring event
D) both a and b

Interrupted Time Series Designs Are Useful When