condition mean min max ZT0-3 0.673357 0.673357 0.673357 ZT4-7 0.8093060000000001 0.8093060000000001 0.8093060000000001 ZT8-11 1.1945715 1.1945715 1.1945715 ZT12-15 1.1807064999999999 1.1807064999999999 1.1807064999999999 ZT16-19 2.14618 2.14618 2.14618 ZT20-23 1.1350689999999999 1.1350689999999999 1.1350689999999999