"The sample is too small, the population is so big therefore the results are irrelevant"
To sample the population of Belgium (11M), or the USA (313M), to a confidence level of 99% (most research papers use a 95% level) at an interval of confidence of 4pts (ie: can be 2pts below or 2pts above) you only need 1040 randomly selected individuals, both in Belgium and in the USA even though the US population is 30 times the Belgian population.
I.e: you only have to poll around 1000 people to be 99% sure that the result you get is only 2pts of percentage above or below the true percentage for the whole population, whether you live in the USA or in Belgium. No poll is done with samples of millions of people.
I’m a fountain of blood.
I’m starting to think I should become a photographer after my studies.