Improvements for first script?

[perfringo]

Some observations.

There is the repetition of input validation. If such pattern emerges then it is clear that function should be used. Currently the code is not DRY (Don't Repeat Yourself). Simple validation function should be used, something along those lines:

def validate(request):
    while True:
        answer = input(request)
        try:
            return abs(float(answer))
        except ValueError:
            print(f'Expected numeric value but {answer!r} was entered')

Now you can use this or similar function when you need to validate user input to be numeric and absolute value. You can be 'clever' and use loop and unpacking while using it:

low, high = (validate(f'Enter the {boundary} measurement value: ') for boundary in ['minimum', 'maximum'])