Use the Following Information for Following Questions

question 21

Essay

Use the following information for following questions:. Which treatment is most effective at
treating bathroom mildew: water mixed with vinegar, ammonia, or soap? In a study, researchers randomly
assigned 55 similar tile samples with similar amounts of mildew to one of three groups. Depending on
which group they were assigned to, each tile sample received a home remedy of water mixed with
vinegar, ammonia, or soap. Afterwards, each tile sample was examined and any remaining mildew was
measured. Researchers found that a soap and water mixture produced better results than both vinegar and
ammonia.
-Is this a controlled experiment or an observational study? Explain.

---

Definitions:

Sexually Intimate

Involves physical and emotional closeness between partners, often within a romantic or sexual relationship.

Grandparents

The parents of one's parents, who play unique roles in family structures ranging from caregiving to cultural transmission.

Endogamy

The practice of marrying within a specific social group, class, or ethnic group, rejecting those from outside as eligible marriage partners.

Arranged Marriages

A marital union where the partners are selected by individuals other than the ones getting married, often involving family members or matchmakers.