condition mean min max ZT0-3 5.377835 5.31096 5.444710000000001 ZT4-7 5.18047 5.18047 5.18047 ZT8-11 5.64316 5.64316 5.64316 ZT12-15 0 0 0 ZT16-19 6.4190249999999995 6.4190249999999995 6.4190249999999995 ZT20-23 5.95193 5.95193 5.95193