condition mean min max ZT0-3 921.0 921.0 921.0 ZT4-7 901.0 901.0 901.0 ZT8-11 866.65 866.65 866.65 ZT12-15 784.95 784.95 784.95 ZT16-19 1195.15 1195.15 1195.15 ZT20-23 1099.4 1099.4 1099.4