College students physical fitness test is an important means for physical fitness evaluation. The test includes body mass index(BMI), lung's capacity, 50 and 1000(male)/800(female) meters run, standing long jump, sit and reach, pull-up(male)/sit-up(female). Final result is weighted sum of the seven items. According to national standard of physical fitness for students, the weights are 15%, 15%, 20%, 10%, 20%, 10%, 10%, respectively. We can regard it as a dimensionality reduction process, which reduces the original data to one dimension. Using fixed weights, the results will neglect differences...
