The Finding That Sleep Becomes More Efficient in People Who

question 176

Multiple Choice

The finding that sleep becomes more efficient in people who regularly sleep less is a key finding because it indicates that

• A) sleep-deprivation studies can indicate how much sleep people need only if the volunteers who are being studied are efficient sleepers.
• B) sleep is a positive incentive.
• C) sleep can be made more efficient by reinforcements and punishments.
• D) only circadian theories can account for the negative effects of sleep deprivation.
• E) sleep can be conditioned.

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Definitions:

Test Statistic

A value calculated from sample data to evaluate a hypothesis in statistical hypothesis testing.

Sampling Distribution

The probability distribution of a statistic (for example, a mean, variance) obtained from a large number of samples drawn from a specific population.

Confidence Interval

A span of numbers obtained from sample data which is expected to encompass the value of a not yet known population characteristic, specified with a defined degree of certainty.

Degrees Of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution or calculation, affecting the shape of the distribution.