APFIVE Minimizing Confidence Interval Width
A study comparing two medications has unequal sample sizes n₁ = 40 and n₂ = 20. If resources allow for adding 20 more subjects to the study while maintaining the same confidence level, which approach would produce the narrowest confidence interval for the difference in means?
A
Add all 20 subjects to the first sample
B
All approaches produce identical interval widths
C
Add all 20 subjects to the second sample
D
Add 10 subjects to each sample
Question Leaderboard
Not enough data yet to show leaderboard.