💎 On data not having to be big to be useful (the sample is most important)

George Gallup, who essentially invented the idea of the opinion poll in the 1930s, came up with a fine analogy for the value of random sampling. He said that if you have a large pan of soup, you do not need to eat it all to find out if it needs more seasoning. You can just taste a spoonful, provided you have given it a good stir.

Excerpt from: The Art of Statistics: Learning from Data by David Spiegelhalter