ACT Preparation / Unit 15 ACT 1403 short lesson, about 20 seconds
Bias
Captions available
The idea
A sample is biased when the way it was chosen systematically favors some outcomes, so it does not represent the population.
In practice
Polling gym members about exercise habits overstates how much the whole town exercises.
Where people slip
A larger biased sample is still biased; size does not fix how the sample was chosen.
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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