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23 Cards in this Set
- Front
- Back
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In hypothesis testing you _______________________
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compare samples for differences
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null hypothesis
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expect NO difference
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alternative hypothesis
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expect a difference
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2 types of alternative hypothesis:
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1-tailed: directional, states HOW they differ
2-tailed: non-directional, just states they differ |
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A 1-tailed hypothesis is ___________ and states _________
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directional, how they differ
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A 2-tailed hypothesis is ___________ and states _____________
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non-directional, just that they differ
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p-value
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the likelihood/probability that the result observed is due to random occurance
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If p>a...
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accept null
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If p<a
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reject null
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3 conditions of CLT
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normal, mean of population, SD decreases
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Standard error of the means states ______________________
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the overall SD of the sample means
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Always fix the __________
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p-value
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Degrees of freedom are ______________________
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the number of values free to vary after certain restrictions are placed on data
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Which confidence limits are tighter?
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95%
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Which confidence limits are looser?
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99%
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Why not do lots of t-tests?
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drive up the probability of making type 1 errors
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Another name for ANOVA is
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f-test
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ANOVA is based on...
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General Linear Model
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The General Linear Model is...
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a conceptual mathematical model
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a priori
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planned, decided prior to study
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a posteriori
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not planned
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HSD stands for
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Honestly Significant Difference
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Chi Squared is non-parametric meaning
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it does not require normality
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