condition mean min max ZT0-3 8.71574 8.142415 9.289065 ZT4-7 5.58624 5.58624 5.58624 ZT8-11 4.00245 4.00245 4.00245 ZT12-15 0 0 0 ZT16-19 11.413185 11.413185 11.413185 ZT20-23 11.57565 11.57565 11.57565