NDA2022MathematicsStatisticsActual
The mean and standard deviation (SD) of marks obtained by 50 students of a class in 4 subjects are given below: array |c|c|c|c|c| Subject & Mathematics & Physics & Chemistry & Biology array c Mean Marks array & 40 & 28 & 38 & 36 SD & 15 & 12 & 14 & 16 array Which one of the following subjects shows highest variability of marks?
Options
- AMathematics
- BPhysics
- CChemistry
- DBiology
Correct answer
C. Chemistry
Step-by-step solution
C.V. of Mathematics = 15 40 100=37.5 % C.V. of Physics = 12 28 100=42.86 % C.V. of Chemistry = 14 38 100=36.84 % C.V. of Biology = 16 36 100=44.44 % Since C.V. of Biology is greatest, therefore, Biology have more variability.