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Standard Deviationitual SeriesCalculate standard deviation (use direct method) and coefficient of standard deviation from the followingdata on marks obtained by 6 students in a class test. 14, 12, 16, 20, 18, 22 ​

Answer»

Explanation:

x= 14 12 16 20 18 22 =102

x2=196 144 256 400 324 484 =1804

  • Am=102÷6=17

  • SD=
  • \sqrt{1804 \div 6 - 17 {?}^{2} }
  • \sqrt{300.666 - 289}
  • =3.4155

CV=SD/AM ×100

=3.4155/17×100

=0.2009×100

=20.0911


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