All five analyses agree to within experimental error, yielding a mean age of 852Myr.
He expects the experimental error to fall to 1 per cent.
Neutrinos have very low mass, so it wouldn't take much experimental error for this sort of result to turn up.
They, too, were correct within the experimental error of a very good analyst.
He deals with tiny deviations that are well within the experimental error.
When it did, they thought it was an experimental error.
No effect greater than the experimental error was observed.
Thus any experimental error will be present in both axes.
In particular it may need to be increased when experimental errors are large.
First, it is easy to extract, making results less prone to experimental error.