Discuss convenience sampling and random sampling.
What will be an ideal response?
The most common method of collecting subjects for small studies is called convenience sampling, a method by which volunteers are approached and asked to participate. This type of sampling is often conducted in shopping malls or other places where people might congregate. Of course, those that volunteer to participate may not represent the general population because 1) they are frequenting the place where the study data are collected and 2) their volunteer status may make them less similar to others who do not volunteer. This type of sampling may impair the external validity of the study.
A more formal method of selecting a sample involves random sampling, a systematic method of approaching individuals to participate in the study. In this situation, the random aspect involves a statistical method that allows every person in the target population to have an equal opportunity to participate. Studies based on random sampling are more likely to represent the target population and reduce study biases due to sampling.
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A) Ask simple questions, and provide ample time for answers. B) Write down your questions, and have the patient read them. C) Ask lengthy questions. D) Get all information from caregivers.
When an EMT is driving an ambulance in emergency mode (lights and sirens), most states do not permit the EMT to:
A) proceed through a red light without stopping. B) drive in the wrong direction down a one-way street. C) turn in any direction at an intersection. D) pass other vehicles in a no-passing zone.
The dorsal roots of the spinal cord contain afferent fibers that transmit impulses from ________ to ________
A) the central nervous system, motor nerves B) sensory nerves, central nervous system C) the central nervous system, sensory nerves D) motor nerves, the central nervous system
The are extensions from the neuron's cell body that are primarily responsible for receiving information from other neurons.
Fill in the blank(s) with the appropriate word(s).