meaning of quartile deviation
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one half of the difference obtained by subtracting the first quartile from the third quartile in a frequency distribution
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one half of the difference obtained by subtracting the first quartile from the third quartile in a frequency distribution.
EXTRA INFORMATION
The formula for quartiles is given by: Lower Quartile (Q1) = (N+1) * 1 / 4. Middle Quartile (Q2) = (N+1) * 2 / 4. Upper Quartile (Q3 )= (N+1) * 3 / 4. Interquartile Range = Q3 – Q1
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