Stats Chapter 1
Terms
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- Data
- facts and figures collected, analyzed, and summarized for presentation and interpretation
- Data Set
- all the data collected
- Elements
- Entities on which data is collected
- Variable
- Characteristic of interest for the elements
- Observation
- measurement obtained for a particular element
- Nominal
- labels or names, nonnumeric label or numeric code
- Ordinal
- order or rank of the data is meaningful
- Interval
- always numeric
- Ratio
- ratio of 2 values is meaningful, variables such as height weight, time
- Categorical Data
- labels or names used to identify, referred to as qualitative data, can be both numeric and nonnumeric
- Quantitative Data
- how many or how much, always numeric
- Discrete
- measuring how many
- Continuous
- how much
- Cross-Sectional Data
- collected at the same or approximately the same point in time
- Time Series Data
- collected over several periods of time
- Population
- set of all elements of interes
- Sample
- subset of the population
- Statistical Inference
- process of using data obtained from a sample to make estimates and test hypotheses
- Census
- collecting data for the entire population