Frequency (redirected from observed frequency)

frequency /fre·quen·cy/ (fre´kwen-se)

1. the number of occurrences of a periodic process in a unit of time. Symbol ?.

2. in statistics, the number of occurrences of a determinable entity per unit of time or of population. Symbol f.

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urinary frequency  urination at short intervals without increase in daily volume or urinary output, due to reduced bladder capacity.

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Frequency

Sound, whether traveling through air or the human body, produces vibrations—molecules bouncing into each other—as the shock wave travels along. The frequency of a sound is the number of vibrations per second. Within the audible range, frequency means pitch—the higher the frequency, the higher a sound's pitch.

Mentioned in: Abdominal Ultrasound

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frequency,

n the number of cycles per second of a wave or other periodic phenomenon.

frequency polygon,

n a graphic representation of a frequency distribution constructed by plotting each frequency above the score or midpoint of a class interval laid out on a base line and connecting the points so plotted by a straight line.

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frequency

1. the number of occurrences of a periodic process in a unit of time.

2. in statistics, the number of occurrences of a determinable entity per unit of time or of population.

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cumulative frequency

the graph of its cumulative frequencies.

frequency distribution

see frequency distribution.

expected frequency

the expected number of occurrences.

observed frequency

the actual frequency; as opposed to the expected frequency.

relative frequency

the number of observations of a particular, nominated value expressed usually as a proportion of the total frequency.

total frequency

the total number of observations in the set of data.

ultrasound frequency

see ultrasound.

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frequency Statistics The number of times that a particular periodic event occurs in a unit time. See Collision frequency, Cumulative frequency, Larmor frequency, Observed frequency, Order frequency, Pulse repetition, Recombination frequency, Relative frequency.