condition mean min max ZT0-3 237.953 233.683 242.223 ZT4-7 176.2415 176.2415 176.2415 ZT8-11 51.38495 51.38495 51.38495 ZT12-15 0 0 0 ZT16-19 42.890550000000005 42.890550000000005 42.890550000000005 ZT20-23 192.9965 192.9965 192.9965