If the algebraic sum of deviations of 20 observations measured from 23 is 70, mean of these observations would be
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solution:--
Mean = (sum of observation) / (number of observation)
Sum of observation is given as = 70
Number of observation = 20
Mean = 70/20 = 3.5
But, here observation starts from= 23.
Mean = 23 + 3.5 = 26.5
solution:--
Mean = (sum of observation) / (number of observation)
Sum of observation is given as = 70
Number of observation = 20
Mean = 70/20 = 3.5
But, here observation starts from= 23.
Mean = 23 + 3.5 = 26.5
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