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Find out the Arithmetic Mean using the step deviation method.

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Find out the Arithmetic Mean using the step deviation method.

Item Number of families
More than 10 28
More than 10 24
More than 20 14
More than 30 4
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In the above problem, cumulative frequencies are given. Firstly, it will be changed into exclusive class interval and thereafter we will calculate arithmetic mean using the formula of Step Deviation Method.

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