$\"\"$

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The given statement is {2.4, 5.6, 1.9, 7.1, 4.3, 2.7, 4.6, 1.8, 2.4}.

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The mean formula is $\"\"$ ,Where n is number of given values.

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Find the mean:

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$\"\"$ (Mean formula) $\"\"$

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$\"\"$ (Add)

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

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The varience formula is $\"\"$ ,Where $\"\"$ is mean

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value.

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Find the variance.

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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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The standard deviation formula is $\"\"$ ,Where $\"\"$ is mean value.

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Find the standard deviation:

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$\"\"$

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$\"\"$ . (Apply square root of each side)

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$\"\"$

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The variance is 3.06, standard deviation 1.75.