condition mean min max ZT0-3 57.855776 57.855776 57.855776 ZT4-7 144.2234105 144.2234105 144.2234105 ZT8-11 159.314854 159.314854 159.314854 ZT12-15 131.5290445 131.5290445 131.5290445 ZT16-19 102.1091135 102.1091135 102.1091135 ZT20-23 93.031705 93.031705 93.031705