In response to the requirements of the National Water Conservation Action Plan to comprehensively promote the construction of water-saving cities,a random sample survey was conducted based on the water consumption of residents in a city. The statistical data was normally transformed to satisfy the minimum statistical sample size. Then,residents water consumption with coverage of 90%, 95% and 99% was analyzed,and the real value of residents water consumption under different gradients was obtained. The price of water consumption of each gradient before and after adjustment was calculated,and the...
