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68-95-99.7 Rule
Degrees of Freedom Statistics
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68-95-99.7 Rule
Degrees of Freedom Statistics
Confidence Interval
Pooled
Variance
Deviation Statistics
Range Statistics
Hypothesis Testing Statistics
Absolute Deviation
Mean
Standard Error
Grouped Data
Statistical Dispersion
Median Absolute Deviation
Standard Deviation
Variable Mathematics
Moment Mathematics
Margin of Error
Standard Score
Binomial Distribution
Random Variable
8:05
Khan Academy
Sal Khan
Variance of a population
Population variance is a measure of how spread out a group of data points is. Specifically, it quantifies the average squared deviation from the mean. So, if all data points are very close to the mean, the variance will be small; if data points are spread out over a wide range, the variance will be larger.
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