condition mean min max ZT0-3 97.96285 97.96285 97.96285 ZT4-7 57.9116 57.9116 57.9116 ZT8-11 156.2495 156.2495 156.2495 ZT12-15 339.034 339.034 339.034 ZT16-19 194.724 194.724 194.724 ZT20-23 159.75799999999998 159.75799999999998 159.75799999999998