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# Mean and standard deviation online calculator

Enter the values Use ',' or new line to separate between values: 2, 4, 6, 7, 8

## You can see a sample solution below. Enter your data to get the solution for your question

$$\displaylines{---}$$
$$\displaylines{Mean = \frac{\sum_{i=1}^{n}x_{i}}{n} \\ \\ \,=\frac{2+4+6+7+8}{5} \\ \\ \,=\frac{27}{5} \\ \\Mean = 5.4 }$$
$$x$$
$$\bar{x}$$
$$x-\bar{x}$$
$$[x-\bar{x}]^{2}$$
$$2$$
$$5.4$$
$$-3.4$$
$$11.56$$
$$4$$
$$5.4$$
$$-1.4$$
$$1.96$$
$$6$$
$$5.4$$
$$0.6$$
$$0.36$$
$$7$$
$$5.4$$
$$1.6$$
$$2.56$$
$$8$$
$$5.4$$
$$2.6$$
$$6.76$$
$$Total$$


$$23.2$$
$$\displaylines{}$$
$$\displaylines{Sample \;variance = (\sigma)^{2} = \frac{\sum_{i=0}^{n}(x_{i}-\bar{x})^{2}}{n-1} \\ \\ \Rightarrow \frac{23.2}{4} \\ \\ \Rightarrow 5.8 \\ \\ \sigma = \sqrt{variance} \\ \\ \Rightarrow \mathbf{\color{Red}{2.408319}} }$$