condition mean min max ZT0-3 12.0694625 11.003875 13.13505 ZT4-7 18.3204 18.3204 18.3204 ZT8-11 9.915759999999999 9.915759999999999 9.915759999999999 ZT12-15 0 0 0 ZT16-19 7.559405 7.559405 7.559405 ZT20-23 12.4777 12.4777 12.4777