10. When conducting a causation study, which of the following is important to know? Causation cannot be determined by observation alone.
Changes in the dependent variable result in changes in the independent variable.
Causation can be determined by observation alone.
A cause-and-effect relationship can exist without a correlation.

answer: all of the above

a. apply ice to the affected area.

b. administer tylenol (acetaminophen).

c. put a gate across the stairs.

d. apply knee and elbow protectors.

answer: no, they are not.*

although rubber bands that contain excessive amounts of dye, toxins, or additives are sometimes toxic, most rubber bands do not cause any health issues. since they are typically made of latex, (a natural substance that is extracted from trees) they are not dangerous in any way if you chew them or accidentally ingest a piece of rubber band. however, chewing rubber bands does pose a choking hazard and is not a good habit to have.

*depending on the type of rubber band. the typical rubber bands that you see at stores are not toxic, but other types of rubber or latex that contains certain chemicals may be unhealthy and hazardous.

answer:

Explanation:

A- 3

B- 4

C- 1

D- 2