Before revision:  Under a common experimental design that randomly assigns units into the experimental group, our method can reduce the variance by up to 50\% , so that only half of the experimental sample is required to attain the same accuracy.
After revision:  Under a common experimental design that randomly assigns units into the experimental group, our method can reduce the variance by up to 50\% in typical experimental designs; therefore, only half of the experimental sample is required to attain the same accuracy.