condition mean min max ZT0-3 52.142224 52.142224 52.142224 ZT4-7 58.717022 58.717022 58.717022 ZT8-11 76.7416415 76.7416415 76.7416415 ZT12-15 91.3184205 91.3184205 91.3184205 ZT16-19 109.95503049999999 109.95503049999999 109.95503049999999 ZT20-23 117.4277565 117.4277565 117.4277565