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. sonographer uses high frequency sound waves to create detailed images of various areas of the human anatomy. The sound waves bounce off of internal organs and return to an ultrasound device, which transforms them into real-time images.