ACT Preparation / Unit 20 ACT 1921 short lesson, about 20 seconds
Repeated Trials and Sample Size
Captions available
The idea
Repeating trials and using more subjects make results more reliable, because chance variation averages out. The more cases observed, the more accurately an effect is estimated.
In practice
Averaging three bounce measurements at each height smooths out one unlucky drop.
Where people slip
Repetition reduces chance error; it cannot fix a biased design.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
- Nothing yet depends on this.
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