condition mean min max ZT0-3 361.59769 361.59769 361.59769 ZT4-7 160.820534 160.820534 160.820534 ZT8-11 122.13877199999999 122.13877199999999 122.13877199999999 ZT12-15 182.3113245 182.3113245 182.3113245 ZT16-19 348.2824235 348.2824235 348.2824235 ZT20-23 309.644946 309.644946 309.644946