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refers to inaccuracies in the values of the data recorded. In surveys,the error may be due to ambiguous or leading questions and the interviewer's effect on the respondent 


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results when the researchers conducting a survey or study are unable to obtain data on all experimental units selected for the sample 


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results when a subset of the experimental units in the population is excluded so that these units have no chance of being selected in the sample 


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involves applying rational thought and the science of statistics to critically assess data and inferences 


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exhibits characteristics typical of those possessed by the target population 


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measurements that cannot be measured on a natural numerical scale; they can only be classified into one of a group of categories 


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measurements that are recorded on a naturally occurrintg numerical scale 


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a statement (usually quantified) about the degree of uncertainty associated with a statistical inference 


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an estimate, prediction, or some other generalization about a population based on information contained in a sample 


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a subset of units of a population 


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a characteristic or property of an individual population unit 


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an object (e.g., person, thing, transaction, or event) upon which we collect data 


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utilizes sample data to make estimates, decisions, predictions, or other generalizations about a larger set of data 


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utilizes numerical and graphical methods to looks for patterns in a data set, to summarize the information revealed in a data set, and to present that information in a convenient form 


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the science of data. This involves collecting, classifying, summarizing, organizing, analyzing, and interpreting numerical information. 


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a sample of 'n' experimental units selected from the population in such a way that every different sample of size 'n' has an equal chance of selection 

