condition mean min max ZT0-3 364.01575 364.01575 364.01575 ZT4-7 436.90117899999996 436.90117899999996 436.90117899999996 ZT8-11 471.72767550000003 471.72767550000003 471.72767550000003 ZT12-15 429.21612749999997 429.21612749999997 429.21612749999997 ZT16-19 502.125273 502.125273 502.125273 ZT20-23 475.170682 475.170682 475.170682