Which of the Following Methods May Be Used to Smooth

question 110

Multiple Choice

Which of the following methods may be used to smooth a time series sufficiently to remove the random variation and to discover the existence of the other time-series components?

• A)Moving averages and exponential smoothing.
• B)Exponential smoothing and deseasonalising.
• C)Deseasonalising and mean absolute deviation.
• D)Mean absolute deviation and the percentage of trend.

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Definitions:

N-Sleep

Refers to non-rapid eye movement (NREM) sleep, which encompasses stages 1 through 3 of the sleep cycle, involving deepening sleep and physiological rest.

Alpha Rhythms

Brainwaves detected through EEG, associated with relaxed, wakeful states, typically with closed eyes.

Beta Rhythms

A pattern of brain wave activity with a frequency of approximately 13 to 30 Hz that is associated with active thinking, focus, and concentration.

Delta Rhythms

Slow, high-amplitude brainwaves present in deep sleep, meditative states, and under certain pathological conditions, reflecting the deepest levels of relaxation and restorative processes in sleep.