if the class marks of a frequency distribution are 29.5,36.5,43.5,50.5, then find the class interval corresponding to the class marks 36.5
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class size of the frequency distribution=36.5-29.5=7 and half of class size=7/2=3.5
therefore the class interval corresponding to 36.5 would be
36.5+3.5=40
36.5-3.5=33
i.e.33-40 are the class intervals
therefore the class interval corresponding to 36.5 would be
36.5+3.5=40
36.5-3.5=33
i.e.33-40 are the class intervals
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