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Qualitative/Quantitative Results


McKenzie Edwards

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Qualitative results means that you're looking for a description of what's happening in terms of the senses rather than numbers (think QUALITies). So colour, odour, a precipitate formed, stuff like that.

Quantitative means numbers (QUANTITies), so any measurements like length, volume, time, etc. You should always have a unit (like seconds or meters) and an uncertainty (+/- 0.05 seconds), meaning that you recognize that your measurement might have some degree of error because your instruments are only so precise.

IB expects that when you do an experiment, you talk about everything that is happening, both qualitatively and quantitatively, so that you record the numbers and the sights and sounds and smells and such that happen. Sometimes, qualitative data that you consider useless can help in explaining why an experiment worked the way that it did.

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