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What is the standard deviation for the data set? 138,129,145,134,142,159,153,142,127

User CharlieQ
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1 Answer

4 votes

Answer:

about 9.91

Explanation:

You want the standard deviation of the given data set:

{138, 129, 145, 134, 142, 159, 153, 142, 127}

Standard deviation

The standard deviation can be found by a suitable calculator, or by working through the formula.

mean = (∑x)/9 = 1269/9 = 141

mean square = (∑x²)/9 = 179813/9 = 19,979.2222...

σ = √((mean square) -mean²) = √98.2222...

σ ≈ 9.91

The standard deviation of this dataset is about 9.91 units.

What is the standard deviation for the data set? 138,129,145,134,142,159,153,142,127-example-1
User Stuti
by
7.8k points
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