The Set of Frequencies Obtained in an Actual Frequency Distribution

question 2

Multiple Choice

The set of frequencies obtained in an actual frequency distribution are the:

• A)observed frequencies.
• B)expected frequencies.
• C)marginal frequencies.
• D)a and c

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Definitions:

Pineal Gland

A small endocrine gland in the brain that produces the hormone melatonin, involved in regulating sleep-wake cycles.

Melatonin

A hormone secreted by the pineal gland that plays a role in setting circadian rhythms.

Biological Rhythms

Natural processes that cyclically change over a period of time in living organisms, such as the circadian rhythm or menstrual cycle.

Onset of Sleep

The transition period from wakefulness to sleep, marking the beginning of the sleep cycle.