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Null Hypothesis (H : 0) Hypothesis that will be accepted unless the data provides convincing evidence that it’s false; status quo Alternative Hypothesis (H ): a Hypothesis that will be accepted only if the data provides convincing evidence of its truth Opposite of null hypothesis Stated in one of the following forms: o Ha: µ ≠ (some value) o Ha: µ < (some value) o Ha: µ > (some value) Test Statistic: Sample statistic that the researcher used to decide between the null and alternative hypothesis o Example: The sampling distribution of assuming µ = 2,400. the chance of observing more than 1.645 standard deviations above 2,400 is only .05 – if in