condition mean min max ZT0-3 81.653958 81.653958 81.653958 ZT4-7 75.8844205 75.8844205 75.8844205 ZT8-11 88.778268 88.778268 88.778268 ZT12-15 94.9077645 94.9077645 94.9077645 ZT16-19 109.44417800000001 109.44417800000001 109.44417800000001 ZT20-23 87.587344 87.587344 87.587344