In Order to Apply the Chi-Square Test of Independence, We

question 49

Multiple Choice

In order to apply the chi-square test of independence, we prefer to have:

• A)at least 5 observed frequencies in each cell.
• B)at least 5 expected observations in each cell.
• C)at least 5 percent of the observations in each cell.
• D)not more than 5 observations in each cell.

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Definitions:

Delta Waves

The large, slow brain waves associated with deep sleep.

N1 Sleep

The first stage of the sleep cycle, characterized as the transition period from wakefulness to sleep, marked by light sleep and a reduction in muscle activity and awareness of the surroundings.

Circadian Rhythm

The internal biological clock that regulates the sleep-wake cycle and other physiological processes within approximately a 24-hour period.

Alpha Wave

A type of brain wave detected by electroencephalography (EEG) that indicates a state of physical and mental relaxation while being awake.