Data Collectionhard
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A randomized trial of a new teaching method includes 60 schools randomly assigned to treatment (n=30) or control (n=30).
Overall Intent-to-Treat (ITT) Effect: Math achievement = +0.12 SD (95% CI: −0.08 to +0.32; p = 0.23, not significant)
Subgroup Analysis by Baseline Math Proficiency:
- High-baseline schools: +0.40 SD (p = 0.06)
- Low-baseline schools: −0.10 SD (p = 0.72)
Which statements correctly interpret this analysis?
A randomized trial of a new teaching method includes 60 schools randomly assigned to treatment (n=30) or control (n=30).
Overall Intent-to-Treat (ITT) Effect: Math achievement = +0.12 SD (95% CI: −0.08 to +0.32; p = 0.23, not significant)
Subgroup Analysis by Baseline Math Proficiency:
- High-baseline schools: +0.40 SD (p = 0.06)
- Low-baseline schools: −0.10 SD (p = 0.72)
Which statements correctly interpret this analysis?