Suppose a researcher decides to conduct a study to show that deep breathing exercises help to lower blood pressure. The researcher decided to separate the participants into two groups. One group would perform the deep breathing exercise at regular intervals over a 30-day period, and then measure their blood pressure an hour later. The other group would take their blook pressure around the same times as the participants in the deep-breathing group over the same 30-day period. After collecting the data, the researcher concluded that deep-breathing lowered blood pressure since the group who performed the deep breathing exercise had a lower blood pressure than the group that did not. 1. Is this study an example of an experiment or an observational study.
