MATH 106 document 2.docx

# MATH 106 document 2.docx - A simple random sample chooses a...

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A simple random sample chooses a sample of items in such a way that every sample of a given size has an equal chance of being selected. Systematic sampling uses a simple system to choose the sample, such as selecting every 10th or every 50th member of the population. Convenience sampling uses a sample that is convenient to select, such as people who happen to be in the same classroom. Stratified sampling first identifies the subgroups and then draws a simple random sample within each subgroup. Note that the first column of a frequency table lists all the categories of data. The second column lists the frequency of each category. Frequency is the number of times each category appears in the data set. Frequency : The number of times the given category appears in each data set. Relative frequency: The number of times each category appears in the data set expressed as a fraction or percentage of the total.

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• Spring '18
• Daphine L. Lewis
• Math, Frequency, Simple random sample, Nontotient

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