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Line 217:
Line 217: − Standard deviation σ=<math>\sqrt{\frac {\sum {fx^2}}{n}-({\frac{\sum fx}{n})^2}}</math> <br>+ − + − σ=<math>\sqrt{214-174.24}</math> <br>+ − σ=<math>\sqrt{39.96}</math> <br> −
Activity- statistics problems (view source)
Revision as of 07:29, 14 August 2014
, 07:29, 14 August 2014→Solution:
σ²=31.12<br>
σ²=31.12<br>
standard deviation σ=<math>\sqrt{varience}</math> <br>
σ=<math>\sqrt{\frac{10700}{50}-({\frac{660}{50})^2}}</math> <br>
. σ=<math>\sqrt{31.12}</math> <br>
. σ=5.58
σ=6.3