What is the std of 100,100,90,90,90,80,80,80,80,80,70 ?

The std of 100,100,90,90,90,80,80,80,80,80,70 is 9.34198…

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Find the Sample Standard Deviation 100 , 100 , 90 , 90 , 90 , 80 , 80 , 80 , 80 , 80 , 70

standard deviation

100, 100, 90, 90, 90, 80, 80, 80, 80, 80, 70

9.34198 \dots

Solution steps

Compute the variance:

87.27272 \dots

Compute

σ (X) = i = 1 \sum n \frac{( x _{i} - x ˉ ) ^{2}}{n - 1} : 9.34198 \dots

9.34198 \dots

95, 82, 77, 64, 100, 97, 95, 95, 81, 80, 80, 84, 98, 77, 61, 69, 71, 80, 100, 999

95, 45, 37, 82, 90, 100, 91, 78, 67, 84, 85, 85, 82, 91, 93, 92, 76, 84, 100, 59, 92, 77, 68, 88

95, 45, 37, 82, 90, 100, 91, 78, 67, 84, 85, 85, 82, 91, 93, 92, 76, 84, 100, 59, 92, 77, 68, 88

78, 80, 66, 68, 71, 64, 82, 71, 70, 65, 70, 75, 77, 86, 72

56, 61, 64, 48, 63, 60, 57, 65, 64, 60, 65, 68, 48, 64, 59, 59

What is the std of 100,100,90,90,90,80,80,80,80,80,70 ?
The std of 100,100,90,90,90,80,80,80,80,80,70 is 9.34198…