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The data set:

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$\"\"$ .

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Calculate the standard deviation by using the formula : $\"\"$ .

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Where $\"\"$ is standard deviation.

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$\"\"$ = Each value in the data set.

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$\"\"$ = Mean of all values in the data set.

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$\"\"$ = Number of values in the data set.

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Find the mean.

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$\"\"$

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$\"\"$

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From each number subtract mean and square the result.

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$\"\"$ ,

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Find the mean of squared difference.

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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Standard deviation about $\"\"$ .