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Activity- statistics problems (view source)
Revision as of 16:56, 10 July 2014
, 16:56, 10 July 2014→Solution
<math>\sum {x} =120 </math> <br>
<math>\sum {x} =120 </math> <br>
σ=
σ=<math>\sqrt{ \frac{\sum {x}^{2} }{n}} -\frac{( {\sum {x}{n} ) ^{2}} }</math>