What is the standard deviation for the data set? 138, 129, 145, 134, 142, 159, 153, 142, 127 Express your answer as a decimal to the nearest tenth.

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asked Mar 3, 2018 171k views

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Brablc · Answer 1 · 2018-03-09T11:41:42+0000

Using a scientific calculator, the standard deviation is computed to be 10.5.

You can also use the formula for standard deviation √[Σ(x-ц)^2/n-1].
ц = (138 +129+145+134+142+159+153+142+127) /9 = 141
Σ(x-ц)^2 = 884
884/8 = 110.5
√110.5 = 10.5

What is the standard deviation for the data set? 138, 129, 145, 134, 142, 159, 153, 142, 127 Express your answer as a decimal to the nearest tenth.

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