Snark aside, it's important. There probably should be someone adequately numerate on every jury.
Most juries will have around half, perhaps more, who've done nothing at all mathematical since school 10-45 years previously and think percentages are in the difficult part of maths (ie it's more than basic arithmetic). HN is going to be very unrepresentative for numeracy. :)
You want them to achieve "beyond reasonable doubt" conclusions from probabilities, percentages, false positive rates and perhaps standard deviations, well you may as well be making your case in French or Ancient Greek that they can pick a few part-understood bits from.
