It Is Not Always Possible to Do a Randomized Experiment

question 12

Multiple Choice

It is not always possible to do a randomized experiment because:

• A) of potential ethical problems
• B) the variables are not always random
• C) researchers typically prefer to conduct nonrandomized experiments
• D) none of the above

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Definitions:

Single-Word Utterance

A stage in language development where children communicate using individual words to express ideas, desires, or needs.

Adult Height

The final stature an individual achieves after the completion of growth, largely determined by genetics and environmental factors.

Immunization

A process that stimulates the body’s immune system by causing production of antibodies to defend against attack by a particular contagious disease. Creation of antibodies may be accomplished either naturally (by having the disease), by injection, by drops that are swallowed, or by a nasal spray.

Lethal Disease

A fatal illness capable of causing death.