There are three quartile values—a lower quartile, median, and upper quartile—which divide the data set into four ranges, each containing 25% of the data points: ...

Derive your third quartile based on whether your data set includes an even or odd set of values. With an odd number of values, multiply N by 3, add 1 and divide the result by 4.

They found that the spread between top and bottom quartile funds in private equity is a whopping 12.9 percentage points compared to 1.5 percentage points for public equities funds.

One Step Closer to Predicting Top Quartile Performance The difference between top and bottom quartile fund performance in private equity is far greater than public equity funds; 12.9 percentage ...