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[–] 2 points 3 months ago* (2 children)

Why does even-ness matter?

Because significant figures.

0.1 means you have a margin of error of ±0.05 (i.e. the true value is between 0.05 and 0.15).

0.08 means the margin of error is ±0.005 (i.e. the true value is between 0.075 and 0.085).

OP's question can be rephrased as "how did we obtain a value to this level of precision?"

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