The Quartile deviation for the data X: 2,3,4,5,6 and Y:3,4,8,4,1 ?
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If y is frequency
Cf is 3,7,15,19 ,20
N/4 th item =5th ie 3
3n/4 th item = 15th = 4
QD=4-3/4+3 =1/7
Cf is 3,7,15,19 ,20
N/4 th item =5th ie 3
3n/4 th item = 15th = 4
QD=4-3/4+3 =1/7
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