$\"\"$

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The set of data is $\"\"$ .

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Find the mean:

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Add the numbers and then divide by the number of values in the data set.

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$\"\"$

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$\"\"$

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$\"\"$ (Add: $\"\"$ )

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$\"\"$ (Divide: $\"\"$ )

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The mean is $\"\"$ . $\"\"$

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Find the variance:

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Square the difference between each number and the mean.

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Then add the square and divide by the number of values.

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ (Add: $\"\"$ )

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$\"\"$ . (Divide: $\"\"$ )

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The variance is $\"\"$ . $\"\"$

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The standard deviation is the square root of the variance.

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$\"\"$ .

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$\"\"$ (Take the square root of the variance)

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$\"\"$ (Cancel square and root)

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$\"\"$ . (Use calculator)

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The standard deviation is $\"\"$ . $\"\"$

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The mean is $\"\"$ .

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The variance is $\"\"$ .

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The standard deviation is $\"\"$ .