Question

Calculate the standard deviation for the following data. fill in all of the table group/bench tube...

Calculate the standard deviation for the following data. fill in all of the table

group/bench tube 3 sample value mean deviation (deviation)2
1 90
2 138
3 103
4 175
5 120
6 81
Sum of squared deviations

a.)Variances

b.)Standard Deviations

  

Homework Answers

Answer #1

from given data:

S.No X mean (X-x̄) (X-x̄)2
1 90.000 117.833 -27.833 774.6944
2 138.000 117.833 20.167 406.6944
3 103.000 117.833 -14.833 220.0278
4 175.000 117.833 57.167 3268.0278
5 120.000 117.833 2.167 4.6944
6 81.000 117.833 -36.833 1356.6944
Σx 707.000 sum of sq deviation 6030.8333
mean=Σx/n 117.8333 variance=s2=Σ(x-x̄)2/(n-1)= 1206.1667
standard dev . s=√s2    = 34.7299
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