NDA2016MathematicsStatisticsActual
In a study of two groups, the following results were obtained: Which of the following statements is correct?
Options
- AGroup A is less variable than Group B because Group A's standard deviation is smaller.
- BGroup A is less variable than Group B because Group A's sample size is smaller.
- CGroup A is less variable than Group B because Group A's sample mean is smaller.
- DGroup A is less variable than group B because Group A's coefficient of variation is smaller.
Correct answer
D. Group A is less variable than group B because Group A's coefficient of variation is smaller.
Step-by-step solution
For Group A: Coefficient of variation C V_A= S.D. Mean = 10 22 =0.4545 . For Group B : C V_B= 12 23 =0.522 Group A is less variable.