how to calculate mean grouped data by direct method ?
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May be the answer of this question is.
The formula to find mean by direct method is x bar = submission fixi upon submission fi.
Hope it's helpful to you.
According to my point of view this is the correct answer.
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Arithmetic Mean by Direct Method - formula
∑i=1nf= Sum of all the frequencies. This is also denoted by N. ∑i=1nfixi= Sum of the product of frequencies and corresponding observations.
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