Unformatted text preview: there was no effect, if the null hypothesis is true. o Directional vs. Non-directional hypotheses o Directional focuses on specific direction o Non-directional does not-Use two tailed test regardless of type of hypothesis o For 5% alpha level, this means using cutoffs of -/+ 1.96 o Use 2 tailed because it is more conservative and you can interpret a significant result in either direction. o...
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- Spring '08
- Null hypothesis, Statistical power, probability Null Hypothesis, trick coin Hypothesis, coin Research Hypothesis