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10 Cards in this Set
- Front
- Back
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hypotheses criteria
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testable, falsifiable, precise, rational, parsimonious
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sources of hypotheses
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1. opinions, observations, experience
2. past literature 3. theory |
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null hypotheses
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= no relationship
ex: coffee has no affect |
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alternative hypotheses
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= relationship
ex: coffee has affect |
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one-tailed test
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ex:coffee has an effect
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two-tailed test
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ex: coffee makes you more or less focused
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steps of hypothesis testing
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1. state hypothesis testing
-what are the null and alternative hypotheses 2. set the criteria for the decision -what is the alpha level/level of significance 3. collect data and complete sample statistics 4. make a decision |
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2. setting the criteria
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alpha level: defines boundary b/t likely and unlikely sample means
critical region: consists of very unlikely sample means in tails of distribution |
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3. collect data and compute
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sample mean you obtain is 42; does it differ from mean of untreated pop. and by how much?
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4. make a decision
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about whether to reject the null ornot - if reject the null can't accept the alternative
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