Im working with data that should follow some restrictions, for example the water level in a tank is measured in % so it cannot be more than 100, however, due to measurement erros it can be the case that the measurement mark 120 for example. How should I work with this data if I don't want wrong data to mess up further statistic calculations?. Is it correct to leave the data in blank? and if so what should the condition: NaN? Thank you for your help!