Mathematics
In the formula : x̄ = a + for finding the mean of the grouped data, di's are deviations from a (assumed mean) of
lower limits of the classes
upper limits of the classes
mid-points of the classes
frequencies of the classes
Measures of Central Tendency
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Answer
In the formula : x̄ = a + for finding the mean of the grouped data, di's are deviations from a (assumed mean) of mid-points of the classes.
Hence, Option 3 is the correct option.
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