# Midterm 1 - Notes part 15.docx - Summary Probability...

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Summary: Probability Sampling Probability sampling gives you a very good chance of getting a representative sample, but does not guarantee it There are several types of probability sampling methods o Simple random sampling, systematic random sampling, stratified random sampling, proportionate stratified random sampling, cluster sampling o Each method has strengths and weaknesses Probability sampling is not always realistic or practical o You must know the whole population and have access to it to do probability sampling Method Description Strengths and Weaknesses Simple Random A sample is obtained using a random process to select participants from a list containing the total population. The random process ensures that each individual has an equal and independent chance of selection. The selection process is fair and unbiased, but there is no guarantee that the sample is representative. Systematic A sample is obtained by selecting every n th participant from a list