condition mean min max ZT0-3 0.186904105 0.17752098 0.19628723 ZT4-7 0.8014292652499999 0.3196013635 1.283257167 ZT8-11 5.0129284345 3.303992183 6.721864686 ZT12-15 6.69658369925 6.4408244575 6.9523429409999995 ZT16-19 5.915595316499999 5.6265606165 6.2046300164999995 ZT20-23 3.7020175914999998 3.242360177 4.161675005999999