780 Men Suffering from High Blood Pressure Were Randomly Assigned

question 49

Multiple Choice

780 men suffering from high blood pressure were randomly assigned to one of two groups.Over a four-month period,the first group received an experimental drug and the second group received a placebo.A larger decrease in diastolic blood pressure was observed for those who received the drug.The experiment was double-blind.Determine the nature and scope of the conclusion the study can reach.

• A)Since the technicians administering the treatment could have been biased,no conclusion can be reached.
• B)Since the physicians evaluating the results could have been biased,no conclusion can be reached.
• C)For men suffering from high blood pressure,the drug appears to lower diastolic blood pressure.
• D)Since there is no random assignment,there is no way to know that the drug caused the decrease in diastolic blood pressure; there could have been confounding variables.
• E)For adults suffering from high blood pressure,the drug appears to lower diastolic blood pressure.

---

Definitions:

Stanford-Binet

A method of measuring intelligence through a standardized IQ test, originally developed by Alfred Binet and later revised at Stanford University.

IQ

A measure of a person's intelligence as indicated by an intelligence test, expressed as a score relative to a statistically normal curve.

WAIS

The Wechsler Adult Intelligence Scale, a commonly used test for assessing adult intelligence.

Verbal

Pertaining to the use of words and language for communication.