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=Previous knowledge=
 
=Previous knowledge=
   −
=Solution=
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=Solution:=
    
<math>\frac{\sum x}{n}=\bar x  </math> <br>
 
<math>\frac{\sum x}{n}=\bar x  </math> <br>
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σ=<math>\sqrt{9}</math> <br>
 
σ=<math>\sqrt{9}</math> <br>
 
σ=3
 
σ=3
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=Problem 2=
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If n =10, =  12 and
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<math>\sum{x^2}= 1530  find  the  standard  deviation </math> <br>
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=INTERPRETATION OF PROBLEM=
 +
 +
=Previous knowledge=
 +
 +
=Solution:=
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