condition mean min max ZT0-3 8266.55 8266.55 8266.55 ZT4-7 6178.6 6178.6 6178.6 ZT8-11 6346.799999999999 6346.799999999999 6346.799999999999 ZT12-15 6992.15 6992.15 6992.15 ZT16-19 8250.2 8250.2 8250.2 ZT20-23 8558.7 8558.7 8558.7