how does the gap between percentages work?

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I don’t even know if the question is well written but this is my doubt: sometimes (in the area of medicine in my case) you can read numbers like “between 30 and 80 percent of the patients have a relapse”.
Isn’t a percentage an average per se?
If I do an experiment with 100 people, shouldn’t I have an exact percentage of people who react in certain way? How can’t I know if they are 30 or 80?

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Anonymous 0 Comments

If you do the experiment on 100 people 100 times you’ll get 100 different results.

Those results are between 30 and 80.

So if you did it once get a number. If you do it many times you get many numbers.

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