what does µ stand for and what does σ stand for? If the mean is 20 and the stand

what does µ stand for and what does σ stand for? If the mean is 20 and the standard deviation is 5 then what would this value be µ + 3σ? Based on your research up to this point form a hypothesis that addresses your question. If you were a researcher in the natural sciences how might you go about testing your hypothesis? In other words what type of experiment would you design and conduct to see if your hypothesis was correct?

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