condition mean min max ZT0-3 0.8385617647500001 0.434119488 1.2430040415 ZT4-7 2.613609454 2.2993881005 2.9278308075000004 ZT8-11 3.68411271175 2.4110907965 4.957134627 ZT12-15 4.083648810750001 3.437568152 4.7297294695000005 ZT16-19 4.22729863225 3.8572424815 4.597354783 ZT20-23 4.3281264114999995 4.204673108 4.451579714999999