"Many elderly rate their health as good despite the health problems that often accompany aging. What does this phenomenon suggest about the usefulness of self-rated heath as a tool to measure health

Ithink the answer is true.

Agroup of engineering students from purdue university reported that its licking machine, modeled after a human tongue, took an average of 364 licks to get to the center of a tootsie pop. twenty of the group's volunteers assumed the licking challenge-unassisted by machinery-and averaged 252 licks each to the center.