condition mean min max ZT0-3 36.889739 36.889739 36.889739 ZT4-7 66.73643849999999 66.73643849999999 66.73643849999999 ZT8-11 77.085117 77.085117 77.085117 ZT12-15 53.006549500000006 53.006549500000006 53.006549500000006 ZT16-19 80.652098 80.652098 80.652098 ZT20-23 53.832301 53.832301 53.832301