condition mean min max ZT0-3 94.747064 94.747064 94.747064 ZT4-7 132.911011 132.911011 132.911011 ZT8-11 138.78097200000002 138.78097200000002 138.78097200000002 ZT12-15 167.3474415 167.3474415 167.3474415 ZT16-19 148.767296 148.767296 148.767296 ZT20-23 151.25627500000002 151.25627500000002 151.25627500000002