Calculate mean by step deviation method. Value l 0-10 10-20 20-30 30 – InterviewSolution

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1.	Calculate mean by step deviation method. Value l 0-10 10-20 20-30 30-40 40-50 Frequency l 8 12 20 6 4
Answer» TION:Class inrevalMid VALUES (X i )Frequency (f i )d i =x i −Au i = HD i F i u i 0-1054-20-2-810-20156-10-1-620-3025=A1000030-4035201012040-50451020220 N=50 Total=26h=10,A=25,N=50,∑f i u i =26Mean ( x )=A+h[ N1 ∑f i u i ]put the values Mean=30.2

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