Ninety residents of a retirement community were selected at random. Each member of the sample was asked a number of questions, including questions about exercise and blood pressure. Residents who exercised more often were less likely to have high blood pressure. Is this an observational study or an experiment?

1. which statement about individual dating is true? ? a. wants to people start dating they must stay in a lifelong commitment b. once to people start dating they must refuse to date others c. there is less pressure for sex in individual dating then in group dating d. going on an individual date can lead to meeting a special friend 2. which example shows a consequence? ? a. getting pregnant after having sex b. denying someone from having sex c. kissing someone on the first date when he or she doesn’t want to be kissed d. going for a walk when one person wants to go out but the other wants to stay home 3. which consequences of having sex is social? ? a. getting an std after having sex b. getting pregnant c. feeling anxious about possible being pregnant d. refusing to meet new people plzzz hurry