The mid-values of the class-intervals of a frequency distribution are – InterviewSolution

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1.	The mid-values of the class-intervals of a frequency distribution are respectively 15,20,25,30,…… The class interval of which the mid-value is 20 is
Answer» `12.5-17.5` `17.5-22.5` `18.5-21.5` `19.5-20.5` ANSWER :B

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