Context: I’m always told on big tests that if I run out of time I should bubble all A’s or something because it’s a better chance I get it right than if I sporadically bubble answers. Why isn’t it just a consistent 25% chance?
In: 0
You’re going to have less variance in your results if you go with a single letter rather than guessing all over.
Assuming a relatively even distribution of answers (i.e, 25% ±5%), if you guess the same letter, you’re going to get somewhere between 20-30% of the remaining answers correct. If you go random, you could theoretically get 100% correct, but you could also get 0% correct, with an average result of 25%.
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