(Solved): Medco Health Solutions Inc. is a prescription drug insurance provider with approtimately 65 million ...

Medco Health Solutions Inc. is a prescription drug insurance provider with approtimately 65 million members. Medco took a random sample of its members to analyne the utilization of mental health-elated medications among the insured population. Sampling was struified by ape, sex, and region to match the demographics of Modco's members. How is a stratified sample different from a simple random sample and what do both types of samples have in common? Complete the explanation.