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9 Cards in this Set

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  • Back
Descriptive Statistics
Analysis for the purpose of describing or characterizing data. Central tendency, variability, shape.
Inferential Statistics
Techniques that allow us to make inferences or draw conclusions about the general populations. Inference tests like student's t-test and the analysis of variability.
A number calculated on sample data that quantifies a characteristic of the sample. ex. average value of a sample set of scores
Number calculated on population data that quantifies a characteristic of the population.
Nominal Scale
Usually qualitative scales: kind of fruit, color, days of the month. Variables are measured by what category they belong. Classification.
Ordinal Scale
Rank objects according to whether they have more, less, or the same amount of the variable being measured. Ex-Boston marathon finish
Ratio Scales
Intervals have equal adjacent units, but there is an absolute zero. Ex-length, weight, age
Continuous Variable
Theoretically can have an infinite number of values between adjacent units on the scale. ex-weight, height, & time
Discrete variable
One in which there are no possible values between adjacent units on the scale ex-number of children in family