The Purpose of a Double-Blind Study Is To

question 9

Multiple Choice

The purpose of a double-blind study is to:

• A) achieve comparability of cases and controls.
• B) reduce the effects of sampling variation.
• C) avoid observer and interviewee bias.
• D) avoid observer bias and sampling variation.
• E) avoid interviewee bias and sampling variation.

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Definitions:

Prior Probability

The probability of an event or hypothesis before new evidence or data is taken into account.

Joint Probability

The probability that two or more events happen at the same time. It's calculated by the intersection of the events' probabilities.

Marginal Probability

The probability of an event occurring, regardless of the possible outcomes of other related events.

Posterior Probability

The probability of assigning events or hypotheses after taking into consideration relevant evidence or background information.