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14 Cards in this Set
- Front
- Back
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2 major areas of stats
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descriptive & inferential
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Descriptive includes
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collection organization summarization presentation of data
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Inferential stats includes
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making inferences from samples to populations estimations & hypothesis testing, predictions...hypothesis theory
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subgroups
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1. random
2. systematic 3. stratified 4. cluster |
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classifications of data
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qualitative
quantitative |
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Qualitative
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discrete - count
continuous - oo # of divisions (height) |
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scales
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1. nominal - no ranking...M/F, math/english
2. ordinal - rankings/ no diff ... divisions (1st, 2nd, 3rd) 3. interval - ranks/precise diff/no 0 - temp, IQ 4. ratio - ranks/precise diff/ true 0 - heights, weights |
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types of studies
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1. observational studies
2. experimental studies |
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Observational studies
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observe and draw conclusions...do not attempt to influence
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experimental study
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manipulate one or more of the independent or explanatory variables...how does this influence the dependent or outcome variable
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independent variable
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one being manipulated (AKA the explanatory variable)
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resultant variable
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dependent or outcome variable
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groups
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treatment and control group
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confounding variable
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influences the dependent or outcome variable but not separated out from the independent variable
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