If the message is confusing and requires an explanation, it's poorly worded. The inverse map doesn't say 'Best case scenario' but rather it says 'low end amount - 9 in 10 chance of higher.'
It's bad but whatever.
"Reasonable Worst Case Scenario" WTF is that exactly? Accuracy by obfuscation?
Goodness that's bad. Worst case by whose standards? Does that mean that's the minimum or maximum? I'd be embarrassed as a met to put that out.