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Variance
01
方差, 差异
a difference or deviation from what is expected or typical
02
变异, 豁免
an official dispensation to act contrary to a rule or regulation (typically a building regulation)
03
差异, 变异
a difference between conflicting facts or claims or opinions
04
方差, 变异
the quality of being subject to variation
05
方差
a measure of the dispersion or spread of a set of data points in statistics, representing the average squared deviation from the mean
06
不和, 分歧
discord that splits a group
07
变异, 偏差
an event that departs from expectations
variance
n
vary
v
covariance
n
covariance
n
例子
The variance of a random variable is the expectation of the squared deviation of that variable from its mean.
There were significant variances between the test scores of the two groups.
When calculating the variance, you sum the squared differences from the mean.
In statistics, variance is a measure of how spread out the values in a data set are around the mean.
The variance formula involves summing the squared differences between each data point and the mean, divided by the number of data points.
