State if the three numbers can be the measures of the sides of a triangle. 1) 10,21,9
2) 6, 10, 7
3) 5, 7,2
4) 5,8,9

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?