Practice Quiz

Six Sigma Green Belt

Category - Black Belt

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A pharmaceutical company is testing the efficacy of a nasal allergy drug. Research participants are asked to record their vital signs before and after drug administration. The results are then compared. What type of statistical test is used here?
  1. paired similar test
  2. before-and-after test
  3. drug efficacy test
  4. paired difference test
Explanation
Answer: D -This type of statistical test is called the paired difference test.

Key Takeaway: A paired difference test compares the means of two related samples. In this example, the same individuals are tested twice, once before drug administration and again afterwards. The means of the two data sets are then compared to determine whether the drug had significantly affected vital signs.
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