query: Why is the variance squared, and does it mean the same thing as the standard deviation?
positive_passages.docid: 8860
positive_passages.text: Why square the difference instead of taking the absolute value in standard deviation?
negative_passages.docid: 17707
negative_passages.text: Why is ${x^{\frac{1}{2}}}$ the same as $\sqrt x $?
negative_passages.docid: 123929
negative_passages.text: What is the correlation if the standard deviation of one variable is 0?
negative_passages.docid: 81308
negative_passages.text: What is the reasoning behind standardization (dividing by standard deviation)?
negative_passages.docid: 138529
negative_passages.text: Why is the standard deviation defined as sqrt of the variance and not as the sqrt of sum of squares over N?
negative_passages.docid: 146616
negative_passages.text: Why is the squared difference so commonly used?
negative_passages.docid: 62621
negative_passages.text: Expected value and variance of trace function
negative_passages.docid: 2799
negative_passages.text: Question about arithmetic–geometric mean
negative_passages.docid: 20038
negative_passages.text: Conceptual questions: Variance of a process
negative_passages.docid: 136419
negative_passages.text: Variance of the distribution of difference scores
negative_passages.docid: 84018
negative_passages.text: Why is there not a simpler way to calculate the standard deviation?
negative_passages.docid: 83780
negative_passages.text: Why are we using a biased and misleading standard deviation formula for $\sigma$ of a normal distribution?
negative_passages.docid: 111749
negative_passages.text: Mean and variance of Squared Gaussian: $Y=X^2$ where: $X\sim\mathcal{N}(0,\sigma^2)$?
negative_passages.docid: 17107
negative_passages.text: Existence of the moment generating function and variance
negative_passages.docid: 30431
negative_passages.text: How is the notation $X\sim N(\mu,\sigma^2)$ read?
negative_passages.docid: 110894
negative_passages.text: Does the variance of a sum equal a double sum of covariances?
negative_passages.docid: 39958
negative_passages.text: Does the variance of a sum equal the sum of the variances?