Thus, mean increases by the amount of increase in wage of each worker as the absolute increase was equal for all.Standard deviation will remain the same that is ?40 as standard deviation is independent of origin and hence an addition of equal amount in all the values will not cause any change in the standard deviation. ’
Uniformity of wages can he seen by coefficient of variation.
Previously, the coefficient of variation was
This shows that wages have become more uniform now as the new coefficient of variation is lower.