In the formula barx = a + (f_i d_i)/f_i, for finding the mean of grouped data di’s are deviations from a of ______.

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In the formula barx = a + (f_i d_i)/f_i, for finding the mean of grouped data di’s are deviations from a of mid points of the classes. Explanation: We know, di = xi – a Where, xi are data and ‘a’ is the assumed mean So, di are the deviations from of mid-points of the classes.

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