STS 110 Lecture Notes - Lecture 2: Simple Random Sample, Convenience Sampling, Systematic Sampling
1 Feb 2018
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Document Summary
If you survey the entire population you are able to get a parameter (only way to calculate a parameter is to survey the entire population) A census does not produce a statistic, they produce a parameter. An issue with the census is that people may lie, not ll it out, or not give the actual amount of household income (overseas bank accounts) Representative sample: a sample that has the same characteristics of the population. Ex: population: all college students, percentage of college students that own a macbook. Sample (representative): randomly select 500 colleges from across the. U. s. and at each college survey 300 students. Bias: when a study or experiment favors certain results (bad study) If done well, every person in the population has an equal chance of being chosen for the sample. Ex: randomly choose 10th person to walk in front of moseley and survey every 15th person thereafter.
