condition mean min max ZT0-3 48.7899 45.781 51.7988 ZT4-7 64.4065 64.4065 64.4065 ZT8-11 62.44435 62.44435 62.44435 ZT12-15 0 0 0 ZT16-19 77.73395 77.73395 77.73395 ZT20-23 64.3442 64.3442 64.3442