condition mean min max ZT0-3 0.793038 0.793038 0.793038 ZT4-7 0.2586125 0.2586125 0.2586125 ZT8-11 0.9991745000000001 0.9991745000000001 0.9991745000000001 ZT12-15 4.09534 4.09534 4.09534 ZT16-19 4.189215 4.189215 4.189215 ZT20-23 2.0533900000000003 2.0533900000000003 2.0533900000000003