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video 7.1. what is a p value? (22:27)

video 7.2. decision errors (17:32)

video 7.3. one-tailed vs two-tailed tests (17:51)

video 7.4. effect size: Cohen's d (11:47)

video 7.5. statistical power (21:28)

video 7.6. confidence intervals (30:00)

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