Answer:
Independent variable: the ACT examination.
Dependent variable : anxiety.
Population : American high schools.
Sample : 11th graders.
Step-by-step explanation:
Independent variable: In research, the independent variable is the variable that is being manipulated or changed by a researcher or experimenter during experimentation or conducting research. Any changes or manipulation in the independent variable will cause a direct change in the dependent variable.
Dependent variable: In research, the dependent variable is the variable that is being tested or controlled by the experimenter or the researcher in an experiment.
Population: A particular group size being selected randomly by the researcher to study.
Sample: A sample is considered as a set of objects and/or individuals that are being collected by the experimenter from a specific population through a well-defined procedure.