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As a result, their calculated ages have had rather large error bars attached to them.

"How big is the error bar in your calculations?"

It would be interesting to see these graphs with error bars!

I'm sure it is, because the error bars are crazy long.

These are represented by filled, blue boxes with error bars of one standard deviation.

Numbers now does error bars, which '08 did not.

These error bars are expressed as estimates of a confidence interval.

I'm not sure the error bars are adequate to contain the drift.

If I know the error bars, why is this a bad thing?