condition mean min max ZT0-3 0.77656575 0.717958 0.8351735 ZT4-7 0.41832250000000004 0.41832250000000004 0.41832250000000004 ZT8-11 0.106198 0.106198 0.106198 ZT12-15 0 0 0 ZT16-19 0.410253 0.410253 0.410253 ZT20-23 0.20636349999999998 0.20636349999999998 0.20636349999999998