If coefficient of variation of A > coefficient of variation of B, it means: a) series A is more consistent than series B
b) Series B is more uniform than series A
c) Series B is more variable than series A
d) None​

Aresearcher believes increased perceived control influence the well-being of residents at a nursing home. to test this , she allowed one group of residents to have control over their daily lies, (where to eat etc) . the other group of 5 residents had these deceisions made by staff. the resident's feelings of well-being were measured on a 10 point scale at the end of a one month trial period. is there a difference on well-being?