Fresh test recheck

Fresh recheck · Whole design or one feature?

Fresh matched 100 g samples starting at 11°C; 23°C room; 15 min. New design changes both seam overlap and layer count; all other conditions match. Covered liquid water; cups/lids, mass, starting temperature, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Each trial uses fresh samples. Accuracy is not supplied.

Supplied design record

Constructed teaching data: these values were invented for this activity, not collected in an experiment.

1. What does the full matched record support? Does it show that seam overlap alone caused the difference? Propose evidence that would address that narrower question.

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A fair comparison of complete designs can change more than one feature. An isolated feature claim needs a comparison that separates that feature from the others.