condition mean min max ZT0-3 1.0143685 0.972652 1.056085 ZT4-7 0.888863 0.888863 0.888863 ZT8-11 0.5309395 0.5309395 0.5309395 ZT12-15 0 0 0 ZT16-19 0.519037 0.519037 0.519037 ZT20-23 1.183441 1.183441 1.183441