Predicting a Range

I’ve tried to make a big deal out of discussing uncertainty as a range of possible values. This gets into considerations of significant figures eventually, but first it’s just recognizing that we can learn more about an experiment by looking at how variable the results are.

You can see on this board that there’s some variability in the points. In fact, this variability increases as the “amount of fertilizer” increases.

This group whiteboarded a question focusing specifically on this range. As they mentioned, they saw a pattern in this variability – the range of possible values increased as the independent variable value increased. Hey, isn’t this what we saw with the ball bounce experiment?

##graphing ##uncertainty ##physicsfirst ##expdesign

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