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Testing a Difference Other Than Zero Sometimes a researcher is interested in testing a difference in means other than zero. In Exercises 27 and 28, you will test the difference between two means using a null hypothesis of H0: μ1 − μ2 = k, H0: μ1 − μ2 ≥ k, or H0: μ1 − μ2 ≤ k. The standardized test statistic is still
28. Architect Salaries Is the difference between the
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Elementary Statistics: Picturing the World (7th Edition)
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