I correct as follows: (Degree of contamination (scale?) * (Number of residents/age)) / (Meticulousness (scale?) * (Number of residents>28Y)) = Interval
If it is a completely fixed element, then that is not a problem. But if the window could be opened (with a key or similar), then it is equivalent to a normally openable window. Sounds strange, but it is so.
If it is a completely fixed element, then that is not a problem. However, if the window could be opened (with a key or similar), then it is equivalent to a normally openable window. Sounds strange, but that's how it is.
because the factor of human error simply cannot be ruled out.