condition mean min max ZT0-3 46.285745 46.285745 46.285745 ZT4-7 95.244985 95.244985 95.244985 ZT8-11 98.422968 98.422968 98.422968 ZT12-15 84.221483 84.221483 84.221483 ZT16-19 82.579369 82.579369 82.579369 ZT20-23 78.3214385 78.3214385 78.3214385