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.
Read on to learn the steps to becoming an ultrasound technician. Step 1: Obtain the Necessary Education. The U.S. Bureau of Labor Statistics (BLS) states that ultrasound technicians need an associate or bachelor's degree in diagnostic medical sonography.