Researchers wanted to estimate how many lizards were living in a nearby wildlife preserve. The researchers went to the preserve and marked 65 lizards. A few weeks later, they returned to the preserve and counted 480 lizards, of which 40 were marked. To the nearest whole number, what is the best estimate for the lizard population?

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?