My answers are (1) E and (2)E.
As for (1), neither the average nor the median gives any picture of deviations. Thus, both are insufficient. Thus E
In (2), I presume v^3 - k^3 is to be determined(cubed v - cubed k).
But v^3 - k^3 = (v-k) (v^2+vk+k^2)
Neither (1) nor (2) can give us the value. Both together also cannot give us any value. Thus E.
1) DS:Is the standard deviation of the salaries of Company Yâ€™s employees greater than the standard deviation of the salaries of Company Zâ€™s employees?
(1)The average (arithmetic mean) salary of Company Yâ€™s employees is greater than the average salary of Company Zâ€™s employees.
(2)The median salary of Company Yâ€™s employees is greater than the median salary of Company Zâ€™s employees.
2) DS:What is the value of v3 â€“ k3?
(1) v k > 0
(2) v â€“ k = 6
Thnx & Rgds,