condition mean min max ZT0-3 469.85 469.85 469.85 ZT4-7 418.7 418.7 418.7 ZT8-11 423.55 423.55 423.55 ZT12-15 506.9 506.9 506.9 ZT16-19 501.79999999999995 501.79999999999995 501.79999999999995 ZT20-23 552.55 552.55 552.55