Q. 9 C4.7( 7 Votes )

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Answer :

class size of class = (upper limit + 0.5) - (lower limit - 0.5)

= (74 + 0.5) - (70 - 0.5)


= 74.5 - 69.5 = 5


Frequency density of class



So frequency density of the first class = 0.6


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