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Line 96:
Line 96: − + − σ=<math>\sqrt{153-144}</math> <br>+ − + −
Activity- statistics problems (view source)
Revision as of 06:53, 13 August 2014
, 06:53, 13 August 2014→Solution:
σ=<math>\sqrt{\frac {\sum {fx^2}}{n}-({\frac{\sum fx}{n})^2}}</math> <br>
σ=<math>\sqrt{\frac {\sum {fx^2}}{n}-({\frac{\sum fx}{n})^2}}</math> <br>
σ=<math>\sqrt{\frac{10700}{50}-({\frac{660}{50})^2}}</math> <br>
σ=<math>\sqrt{\frac{10700}{50}-({\frac{660}{50})^2}}</math> <br>
σ=<math>\sqrt{\frac{1530}{10}-{144}}</math> <br>
σ=<math>\sqrt{214-174.24}</math> <br>
σ=<math>\sqrt{39.96}</math> <br>
σ=<math>\sqrt{9}</math> <br>
σ=6.3
σ=3