Systematic random sampling. Systematic random sampling is done through some ordered criteria by choosing elements from a randomly arranged sampling frame. You can chose from every ânthâ element in a sample frame i.e. 10th, 15th, 20th and so on.
An associate or bachelor's degree is typically required to pursue employment as a diagnostic medical sonographer. Students also have the option to graduate with a degree in a related field, pursue a certificate program in diagnostic medical sonography and then receive on-the-job training.earn how to become a diagnostic medical sonographer. Research the job description, education and licensing requirements to find out how to start a career in medical sonography.
Training. To become a sonographer, both classroom and clinical training is required. Students take general courses in anatomy and physiology as well as ultrasound-specific imaging. Students are also required to take ultrasound physics courses, which can be quite challenging.ork Environment. Most sonographers (about 60 percent) work in hospitals. Often, hospital-based sonographers will get rotations of being on-call, which means they will have to be ready to return to the hospital at any hour of the night, weekend, or holiday if an emergency ultrasound is needed.