A time series design used when an intervention has occurred during a short time period (e.g. one week out of ten observation periods spread out over ten weeks) is called a(n)

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An interrupted time series design is used when an intervention occurs during a short time period within a longer observation period. This design is useful for studying the effects of interventions or policies on a particular outcome over time. Pretest/posttest time series designs involve multiple observations before and after an intervention, while intervention time series and regression time series designs are not specific to interventions during short time periods.

A Time Series Design Used When an Intervention Has Occurred