condition mean min max ZT0-3 0.08312563333333332 0.0408848 0.14578354999999998 ZT4-7 0.0200216 0.0200216 0.0200216 ZT8-11 0.2324885 0.2324885 0.2324885 ZT12-15 0.33327249999999997 0.266508 0.400037 ZT16-19 0.2664645 0.2664645 0.2664645 ZT20-23 0.12288135 0.12288135 0.12288135