condition mean min max ZT0-3 236.61414 236.61414 236.61414 ZT4-7 703.4680185 703.4680185 703.4680185 ZT8-11 970.9917545000001 970.9917545000001 970.9917545000001 ZT12-15 832.163787 832.163787 832.163787 ZT16-19 693.64268 693.64268 693.64268 ZT20-23 735.522176 735.522176 735.522176