write the formula for calculating 'Arthemetic Mean' in step deviation method and explain each letter in it
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total number divided by the sum of all numbers
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Let assumed mean =A
Sum of frequencies=f
Sum of profuct of frequencies= d
Then
A+[ fd/f ]
Assumedmean+ [, sum of frequencies ×sum of the product of frequencies /sum of the. frequencies ]
Sum of frequencies=f
Sum of profuct of frequencies= d
Then
A+[ fd/f ]
Assumedmean+ [, sum of frequencies ×sum of the product of frequencies /sum of the. frequencies ]
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