The upper quartile is that value above which 25 per cent of the observations lie . 上四分位数是25的观察值位于其上的值。
2.
Percentage change in income less income tax for the upper quartile household minus the percentage change in income less income tax for the lower quartile . gross domestic fixed capital formation as a percentage of gdp 上四分位数住户的入息（已扣除入息税）变动百分比与下四分位数住户的入息（已扣除入息税）变动百分比的差额。
