I think the problem is that students don’t have good general problem-solving skills. If they can’t guess the answer, and there’s no formula, they don’t know where to start or how to check their answer.

]]>Every term in a regression has units. The intercept is always already in terms of [target]. Every coefficient is in terms of [target]/[feature]. For categorical targets, the units are probability of category.

When applying a unit conversion, you can only apply it to terms that already have that unit in them.

This also solves the divide vs multiply confusion. You know you have to end up with probability of heavy/cm from probability of heavy/in.

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