condition mean min max ZT0-3 48.994525 48.21665 49.772400000000005 ZT4-7 44.094049999999996 44.094049999999996 44.094049999999996 ZT8-11 34.564899999999994 34.564899999999994 34.564899999999994 ZT12-15 0 0 0 ZT16-19 50.19385 50.19385 50.19385 ZT20-23 53.17165 53.17165 53.17165