condition mean min max ZT0-3 0.21451949999999997 0.104038 0.32907949999999997 ZT4-7 1.51552 1.51552 1.51552 ZT8-11 26.40875 26.40875 26.40875 ZT12-15 31.646749999999997 26.92645 36.36705 ZT16-19 8.43404 8.43404 8.43404 ZT20-23 1.7831700000000001 1.7831700000000001 1.7831700000000001