Deviation - -Class mark - assumed meanClass mark - frequencyClass mark - upper limit- f-i x-i- - f-i-

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Mean of Ungrouped Frequency Distribution by Direct Method

Deviation = _...

Question

Deviation = _______.

Class mark - assumed mean

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Class mark - frequency

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Class mark - upper limit

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\sum f_{i} x_{i}, \sum f_{i}

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Solution

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\bar{X} = a + \frac{Σ f_{i} d_{i}}{Σ f_{i}}

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M_{g} = x + \frac{1}{\sum f_{i}} (\sum f_{i} d_{i})

¯ x = a + \frac{\sum f_{i} d_{i}}{\sum f_{i}}

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