condition mean min max ZT0-3 24.1387 24.1387 24.1387 ZT4-7 27.33245 27.33245 27.33245 ZT8-11 9.363765 9.363765 9.363765 ZT12-15 10.7944 10.7944 10.7944 ZT16-19 12.53385 12.53385 12.53385 ZT20-23 22.859450000000002 22.859450000000002 22.859450000000002