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Statistics Vocabulary ch1
concept study
16
Sociology
Undergraduate 1
03/06/2006

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Term
measurement error
Definition
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
Term
nonresponse bias
Definition
results when the researchers conducting a survey or study are unable to obtain data on all experimental units selected for the sample
Term
selection bias
Definition
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
Term
statistical thinking
Definition
involves applying rational thought and the science of statistics to critically assess data and inferences
Term
representative sample
Definition
exhibits characteristics typical of those possessed by the target population
Term
qualitative data
Definition
measurements that cannot be measured on a natural numerical scale; they can only be classified into one of a group of categories
Term
quantitative data
Definition
measurements that are recorded on a naturally occurrintg numerical scale
Term
measure of reliability
Definition
a statement (usually quantified) about the degree of uncertainty associated with a statistical inference
Term
statistical inference
Definition
an estimate, prediction, or some other generalization about a population based on information contained in a sample
Term
sample
Definition
a subset of units of a population
Term
variable
Definition
a characteristic or property of an individual population unit
Term
experimental unit
Definition
an object (e.g., person, thing, transaction, or event) upon which we collect data
Term
inferential statistics
Definition
utilizes sample data to make estimates, decisions, predictions, or other generalizations about a larger set of data
Term
descriptive statistics
Definition
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
Term
statistics
Definition
the science of data. This involves collecting, classifying, summarizing, organizing, analyzing, and interpreting numerical information.
Term
random sample
Definition
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
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