A Researcher Studies a New Mathematics Program

question 20

Multiple Choice

A researcher studies a new mathematics program. At the beginning of the year, 100 students are randomly assigned to receive a new program and 100 students are randomly assigned to use the previously used mathematics program. The participants are pretested at the beginning of the year, and they are posttested at the end. What kind of experimental design did the researcher use?

• A) Pretest-posttest control-group design
• B) Posttest-only design with nonequivalent groups
• C) One-group posttest-only design
• D) Posttest-only control-group design

---

Definitions:

Detoxification Center

A facility that provides supervised detox and treatment for individuals suffering from substance abuse or addiction.

Prescription

A formal instruction written by a medical practitioner that authorizes a patient to be provided a medicine or treatment.

SARS

Severe Acute Respiratory Syndrome, a viral respiratory illness caused by a coronavirus, marked by fever, cough, and severe pneumonia.

Guangdong Province

A coastal province of southeast China, known for its economic dynamism and manufacturing industry.