condition mean min max ZT0-3 241.118957 241.118957 241.118957 ZT4-7 224.6016795 224.6016795 224.6016795 ZT8-11 226.7440335 226.7440335 226.7440335 ZT12-15 263.269714 263.269714 263.269714 ZT16-19 283.147223 283.147223 283.147223 ZT20-23 339.9936245 339.9936245 339.9936245