How many Countries in Africa?

“The scientist is not a person who gives the right answers, he’s one who asks the right questions.” ~ Claude Lévi-Strauss

If you don’t know the answer to the question in the title then you’re far from alone –please don’t google it just yet!

So, imagine you’re observing a study. There are two groups that are separately given the same task, to collectively decide whether the number of countries in Africa is more or less than a certain provided value. One group are asked “Are there more or less than 20 countries?” for the other group the provided number is 40. Lets look at how this is done and how the groups differed.

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