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Interquartile Range
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PREVIOUS KNOWLEDGE
• Median For Grouped Data (with Class Interval)
m = medianL = Lower boundary of median classN = Number of dataF = Total frequency before median classfm = Total frequency in median class
c = Class size = (Upper boundary – lower boundary)
INTERQUARTILE RANGE OF GROUPED DATA (WITH CLASS
INTERVAL)
Method 1 (using a cumulative frequency table)
Method 2 (using an ogive)