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Vascular Access Exam Prep

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In hypothesis testing, the area of the curve in which it is unlikely a researcher will obtain means is called the rejection region (or region of unlikely values). What conclusions are drawn when obtained values fall in the rejection region?
  1. The experiment was unsuccessful and needs to be redesigned
  2. Null hypothesis is rejected; there are differences between groups
  3. Null hypothesis is rejected; there are no statistically significant differences between groups
  4. Null hypothesis is accepted; there are no statistically significant differences between groups
Explanation
Answer: B -- When obtained values fall in the rejection region, a researcher concludes that there are differences between groups; null hypothesis is rejected. This outcome provides statistically significant findings.
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