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9 Cards in this Set
- Front
- Back
Descriptive Statistics
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Analysis for the purpose of describing or characterizing data. Central tendency, variability, shape.
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Inferential Statistics
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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.
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Statistic
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A number calculated on sample data that quantifies a characteristic of the sample. ex. average value of a sample set of scores
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Parameter
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Number calculated on population data that quantifies a characteristic of the population.
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Nominal Scale
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Usually qualitative scales: kind of fruit, color, days of the month. Variables are measured by what category they belong. Classification.
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Ordinal Scale
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Rank objects according to whether they have more, less, or the same amount of the variable being measured. Ex-Boston marathon finish
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Ratio Scales
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Intervals have equal adjacent units, but there is an absolute zero. Ex-length, weight, age
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Continuous Variable
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Theoretically can have an infinite number of values between adjacent units on the scale. ex-weight, height, & time
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Discrete variable
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One in which there are no possible values between adjacent units on the scale ex-number of children in family
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