How To Test Hypotheses - Stat Trek
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Find the P-value. The P-value is the probability of observing a sample statistic as extreme as the test statistic, assuming the null hypothesis is true.
- For a one-tailed test. Find the probability of seeing a sample statistic greater than the absolute value of the test statistic. That is the P-value.
- For a two-tailed test. Find the probability of seeing a sample statistic greater than the absolute value of the test statistic. Multiply that probability by 2 (to account for extreme values in the positive and negative tails of the sampling distribution). That is the P-value.
The P-value for a one-tailed test is half of the P-value for a two-tailed test.
Tag » Appropriate Hypothesis Tests
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H1: μ < μ0 , Where A Decrease Is Hypothesized And This Is Called A Lower-tailed Test; Or. H1: μ ≠ μ 0, Where A Difference Is Hypothesized And This Is Called A Two-tailed Test. ... Hypothesis Testing: Upper-, Lower, And Two Tailed Tests.
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