Social Sciences and History / Unit 9 SSH 0802 short lesson, about 20 seconds
A Scientific Poll: Sample, Randomness, Margin
Captions available
The idea
A scientific poll builds a representative and random sample, each person having an equal chance of selection, so responses resemble the population's, and carries a lower margin of error, how far results may sit from true preferences.
In practice
Phones, online, and social media as the methods.
Where people slip
Timing, social pressure, ignorance and human nature distort even scientific polls.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Something wrong in this lesson? Flag it