Statistics (Measures of Dispersion)
Range is the difference between the highest and lowest observations of the data.
Example: The runs scored by a batsman in 6 matches are as follows.
24, 126, 78, 43, 69, 86
What is the range of the scores?
Highest score of the batsman = 126
Lowest score of the batsman = 24
∴ Range = Highest score – Lowest score = 126 – 24 = 102Quartile Deviation Quartile deviation is the half of the difference between third quartile, Q3 and first quartile, Q1 of the series. ∴ Quartile deviation = Q3-Q12 Quartile deviation gives half of the range of middle 50% observations. Quartile deviation is also known as semi-inter quartile range. Calculation of Quartile Deviation 1. For an individual series, the first and third quartiles can be cal…
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