0 a number that shows the amount by which members of a group are different from the mean (= average) value for the group:
1 a measurement of the degree to which each number in a set of numbers is different from the average:
He would calculate the standard deviation of players' won-lost records as a check against his computer-generated projections.
All of the children scored within one-half standard deviation of the mean on the test.
Table 2 presents the means and standard deviations for frequency and duration.
A machine is designed to produce rods 2 cm long with a standard deviation of 0.02cm.
