Question

Write the formula for mean in step deviaton method

Answer 1

The formula used for arithmetic mean of grouped data by step deviation method is, X=A+∑f∑fd′×i. A= Assumed mean of the given data. ∑ = Summation of the frequencies given in the grouped data. ∑fd′ = Summation of the frequencies and deviation of a given mean data.

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Answer 2

Step deviation method=a+{fiui/fi} ×h

a=assumed mean

hi=height

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