A change to the norm is called a variance. It suggests a difference or shifting away from the expected or usual, an example being snow in July, which is a variance in the weather of the United States, even in Minnesota.
When the word variance is used in a comparison, it is usually preceded by the word "at," as in "Her values were at variance with her actions," meaning the two differed. This makes sense, as the word, first seen in Middle English, comes from the Latin verb variāre, which means "to change." If a contractor needs to go outside the standing building code, he needs to obtain a variance, which is legal permission to make a change from the norm.
n the quality of being subject to variation
characterized by variation
variability in coloration
variability attributable to individual differences
n an activity that varies from a norm or standard
n the second moment around the mean; the expected value of the square of the deviations of a random variable from its mean value
the square root of the variance
(statistics) the mean value of the product of the deviations of two variates from their respective means
- Type of:
the n-th moment of a distribution is the expected value of the n-th power of the deviations from a fixed value