Flashcards
Data Terminology
Flashcards do conjunto (20)
- 1Quantitative DataData that is numerical
(Measured in numbers)
This data will always have a mean - 2Qualitative DataData that is measured by the number of people in a sample
This data will have proportions
Categorical Data - 3Ordinal DataData that is categorical and conveys a ranking
e.g. clothing size, age - 4Nominal Datadata that has labels
e.g. ethnicity, gender - 5Discrete DataMeasured in specific Values/ numbers
- 6Continuous Datanumerical data that can be measured with an infinite number of values
- 7MeanMeasure of central location
Average of the data set
Add all the data points in a population and then divide the total by the number of points. - 8MedianMeasure of central location
The middle value of a listed data set - 9ModeMeasure of central location
The value that occurs most often within a data set - 10RangeThe difference between the largest and the smallest values of a data set
Range = largest value - smallest value - 11Interquartile RangeA measure of variability, based on dividing a data set into quartiles
- 12VarianceThe expectation of the squared deviation of a random variable from its mean
Variance = std dev ² - 13Standard DeviationA quantity expressing by how much the members of a sample differ from the mean value for the group
- 14Co-efficient of VariationThe coefficient of variation is a measure of spread that describes the amount of variability relative to the mean.
CV = Std Dev / Sample Mean - 15SkewnessMeasure of Normality
The curve appears skewed either to the left or to the right - 16KurtosisMeasure of normality
The sharpness of the peak of a distribution curve - 17cross-sectional dataData collected at a certain point in time across a number of units of interest
- 18Time Series DataData collected over time for the same units of interest
- 19CovarianceHow changes in one variable are associated with changes in a second variable.
- 20Correlation coefficientA measure of the linear relationship between two variables. A positive correlation represents two variables that move in the same linear direction
(negative = opposite direction)
Between -1 and 1
Informações
- Descrição
- Statistics FlashCards sobre Data Terminology, criado por Claudia Miles em 04-06-2017.
- Criado por
- Claudia Miles
- Visualizações
- 51
- Tags
- Avaliação