Question: Suppose a study first asked people whether they meditate regularly and then measured their blood pressures. The idea would be to see if those who

Suppose a study first asked people whether they meditate regularly and then measured their blood pressures. The idea would be to see if those who meditate have lower blood pressure than those who do not do so.
a. Explain whether this would be an observational study or a randomized experiment.
b. If it were found that mediators had lower-than-average blood pressures, can we conclude that meditation causes lower blood pressure? Explain.

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