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BS Nursing Introduction To Biostatistics
nmdcat.online June 6, 2026

172. A medicinal study aims to determine if a new drug causes a statistically significant decrease in a continuous biomarker. The alternative hypothesis is that the mean biomarker level in the drug group is lower than in the placebo group. What technical type of hypothesis test is this?

A. Two-tailed test.
B. One-tailed (right-tailed) test.
C. One-tailed (left-tailed) test.
✓
D. Non-directional test.

📖 Additional Information

  • Two-tailed test.
  • One-tailed (right-tailed) test.
  • One-tailed (left-tailed) test.
  • Non-directional test.

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171. In a clinical study, researchers want to determine if a new therapy improves a continuous outcome (e.g., quality of life score). They collect data from a single group of patients before and after the therapy. Which technical statistical test is most appropriate for the primary analysis?

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