Answer the following statements true (T) or false (F)
1. Cross-sectional studies are studies of the same group over a period of time and generally are studies of change.
2. Longitudinal designs involve studies of one group at one time and usually refer to a representative sample of this group.
3. Time-series designs measurement of a single variable at successive points in time.
4. Interrupted time-series designs can then be defined as an analysis of a single variable measured at many successive time points, with some measures taken prior to a treatment (interruption) and others taken after the treatment.
5. A distinction is also made between multiple interrupted time-series designs, which examine one group or site’s preprogram and post-program outcomes over time, and single interrupted time-series designs, which contrast one group’s performance with that of relevant comparison groups.
1. False
2. False
3. True
4. True
5. False
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