standard deviation 
noun Statistics
A quantity expressing by how much the members of a group differ from the mean value for the group.Average values and standard deviations were then calculated for each of the compounds in the experiment....
- If no standard deviations were reported then we used the average standard deviation for all the remaining studies.
- Mean values and standard deviations were calculated for all variables.
- have a hand in something
- have a heart
- have a heart of gold
- have a lash at
- have all day
- have a lock on
- have a long way to go
- have a lot (or not much) on the ball
- have a mind of one's own
- have a moment
- have a mountain to climb
- have an axe to grind
- have an eye for
- have a nice day
- have ants in one's pants
- have a/one's cross to bear
- have a (or a good or half a) mind to do something
- have a (or one's) bellyful
- have a plum in one's mouth
- have a problem with
- have a screw loose
- have a shy at
- have a soft spot (also soft corner) for
- have at
- have a thick (or thin) skin