One definition of the lower quartile is the middle number between the smallest number and the median of the data set.

The difference between the upper and lower quartiles is called the interquartile range.

No Arab countries were in the top quartile, and 7 countries were in the lowest quartile.

In the lowest quartile, the mean age was only slightly older, 74, and 16 per cent were men.

Yet Hummer Winblad fell into the lowest quartile that year, providing a negative annual return of 15.3 percent over the life of its fund.

Base salaries are at the median level while total compensation, including bonuses, is in the lower quartile.

The lowest quartile from the rankings were then designated "low income."

The 20% threshold adopted in 1970 was derived by calibrating a statistic of household income that most closely approximated the 1960 lower quartile.

In majority-white schools, bad teachers are rare: just 11 percent of the teachers are in the lowest quartile.

"What we've done," she said, "is taken a step, and even a conservative step at that, in getting him out of that lowest quartile."