In the step deviation method,

What is the meaning of ui

Ui is a new variable obtained from variable Xi by subtracting the assumed mean M and dividing the result by (normally) the class width H. e.g. Ui = (Xi - M)/H.  The purpose of this exercise is to obtain values for Ui which are easier to handle.

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U r right !!!!  thanks for commenting.........

but u are talking about formula.

I am asking what is the meaning of u ? not formula ..........

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We want meaning.. Not formula
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What is the meaning of you in step division method to calculate mean
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Ui= (xi-a)/h
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Class size
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I don't know the answer
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What are you looking for?