What do you think is the false negative ratio of the remaining 27%? A 0.1% total conversion rate would imply 1/270 visitors buying stuff and I am quite certain

What do you think is the false negative ratio of the remaining 27%? A 0.1% total conversion rate would imply 1/270 visitors buying stuff and I am quite certain I buy stuff in maybe every 10th online store I visit or something.