condition mean min max ZT0-3 113.148682 113.148682 113.148682 ZT4-7 75.14778150000001 75.14778150000001 75.14778150000001 ZT8-11 97.300034 97.300034 97.300034 ZT12-15 102.78748150000001 102.78748150000001 102.78748150000001 ZT16-19 124.28242399999999 124.28242399999999 124.28242399999999 ZT20-23 131.806477 131.806477 131.806477