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16 Cards in this Set
- Front
- Back
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Explain data.
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Data are the facts and figures collected, analyzed and summarized for presentation and interpretation.
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What is an element?
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The entities on which data are collected.
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What is a variable?
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It is a characteristic of interest for the elements.
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Explain observation.
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Measurements collected on each variable for every element in a study provide the data. The set of measurements obtained for a particular element is called an observation.
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What is a nominal scale?
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When the data for a variable consists of labels or names used to identify an attribute of the element.
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What is an ordinal scale?
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If the data exhibit the properties of nominal data and the order or rank of the data is meaningful.
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What is an interval scale?
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The data show the properties of ordinal data and the interval values is expressed in terms of a fixed unit of measure.
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What is a ratio scale?
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The data have all the properties of interval data and the ratio of two values is meaningful.
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Explain qualitative and quantitative data.
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Qualitative data include labels or names used to identify an attribute of each element, while quantitative data require numeric values that indicate how much and how many.
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What is cross-sectional data?
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Data collected at the same or approximately the same point in time.
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What is time series data?
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Data collected over several time periods.
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Explain descriptive statistics.
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Data presented in a form that is easy for the reader to understand.
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What is a population?
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A population is the set of all elements of interest in a particular study.
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What is a sample?
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A sample is a subset of the population.
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What is a census?
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The process of conducting a survey to collect data for the entire population.
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What is statistical inference?
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Test hypothesis about the characteristics of a population through a process.
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