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STAT Exam 1 Terms

# STAT Exam 1 Terms - 1 Statistics the art and science of...

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1. Statistics – the art and science of learning from data. 2. Design – planning how to obtain data to answer the questions of interest. 3. Description – summarizing the data that are obtained. 4. Inference – making decisions and predictions based on the data. 5. Population – the total set of subjects in which we are interested. 6. Sample – the subset of the population for whom we have data. 7. Descriptive Statistics – methods for summarizing the data. The summaries usually consist of graphs and numbers such as averages and percentages. 8. Inferential Statistics – methods of making decisions or predictions about a population, based on data obtained from a sample of that population. 9. Parameter – a numerical summary of the population. 10. Statistic – a numerical summary of a sample taken from the population. 11. Variable – any characteristic that is recorded for subjects in a study. 12. Categorical Variable – if each observation belongs to one of a set of categories.

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