condition mean min max ZT0-3 65.91116666666666 41.282 80.10705 ZT4-7 33.92405 33.92405 33.92405 ZT8-11 38.2841 38.2841 38.2841 ZT12-15 53.73805 48.4724 59.003699999999995 ZT16-19 64.5358 64.5358 64.5358 ZT20-23 84.4822 84.4822 84.4822