Cheat sheet for Quiz 1 - Statistics is the science of data...

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Statistics is the science of data, data is the result/outcome of an experiment (numeric or labels)= the items upon which this information is collected are called experimental units . Target population: group of items about which the investigator ultimately wants to draw inference. Sample population: is the group of items from which the sample is actually drawn. (groups could be the same.) Census Data : measurements are obtained from every unit in the target population. Sample: a subset of the entire population that is captured in a study. The variable(s) of interest is measured on each item of the sample and statistics are computed based on the “values” of these variables. SimpleRandomSample(SRS ): a sample of the population where every unit has an equal opportunity to be selected. Confounding: when the investigator can’t separate the effects of one from the other. Parameter: numeric characteristic pertaining to a population. (Estimate=comes after the word). Most often they cannot be
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