The deviations of the individual results from the mean result are then calculated as follows: subtract the mean from each of the individual masses determined. For the sample data, the deviation calculations should look like this:

    
Trial 1 Trial 2 Trial 3
(10.143 - 10.127) = 0.016 g
(10.115 - 10.127) = -0.012 g
(10.124 - 10.127) = -0.003 g