American Government / Unit 4 Gov 169 short lesson, about 20 seconds
Random Sampling
Captions available
The idea
A random sample gives every member of the population an equal chance of selection, which is what makes a poll's responses resemble the population's.
In practice
One thousand randomly selected adults can stand in for a country; a million volunteers cannot.
Where people slip
Representativeness comes from the method of selection, not the number selected.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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