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15 Cards in this Set
- Front
- Back
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Inferential Statistics
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describes what is happening in a population from a sample
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Descriptive Statistics
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Using graphs to organize stats
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Stratify (when, what, why)
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when- observation
what- to divide into subgroups why- to decrease variation |
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4 Key concepts in experimental design
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randomization, blocking, replication, control
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randomization
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gets rid of bias
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blocking
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finding something that is unique and creating sub groups
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replication
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insuring that you can go from a small sample to a population
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control
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holds extraneous factors constant
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confounded (aka _____)
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(extraneous) effects on the response variable cannot be distinguished from each other
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experimental condition (aka ___)
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(independent) the treatment (what is being tested)
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response variable (aka____)
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(dependent) what is the outcome
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experiment has _____ _____
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cause &effect, treatment
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observation has ___ _____
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no cause & effect, observe whats already there
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what is the difference between blocking and stratifying
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blocking- experiment, stratifying- observation
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how to make an experiment better?
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replicate
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