Find the mean using the step deviation method. Class 0-10, 10-20, 20-30, 30-40, 40-50, Frequency 6 10 15 9 10.

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asked Sep 8 in Maths by Priya (33.3k points)

Find the mean using the step deviation method.

Class	0-10	10-20	20-30	30-40	40-50
Frequency	6	10	15	9	10

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answered Sep 8 by Haren (268k points)

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Let a = 25 and h =10

Mean = a + (Σfu/Σf) × h

Mean = 25 + 10 × ( 7/50 ) = 26.4