Example for economic system

To what kinds of messages might the brain respond to keep you balanced on one foot?

Pj conducts an experimental study on the effects of soft music during high stakes science testing. he randomly assigns students at the school. in one condition he does not provide music for testing while in the other group he does provide the music. he administers a pretest at the beginning of the year and a posttest at the end of the year. pj’s design is best described as a: a.static group comparisonb. pretest-posttest control group designc.control-group-time-series designd. nonrandomized control-group pretest-posttest design

The health care system in is referred to as a singleminus−payer health care system, and is a system in which the government provides national health insurance to all residents.