What is the formula for standard deviation and variance

1.	What is the formula for standard deviation and variance
Answer» \t\tStandard Deviation Formula:\tσ\xa0\xa0=\xa0{tex}\\sqrt{\\frac{\\sum \\left ( x-\\bar{x} \\right )}{N}}{/tex}Where,σ\xa0is the standard deviationx Indicates each value of the populationx¯\xa0shows the mean of all valuesN is the total number of values\xa0\tThe variance is written as\xa0σ2

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