Description
The calculation of mttX (median-time-to-X) depends on the computation of percentile values. The current implementation does not behave nicely with a small sample size. For instance, for a given sample set of
{50, 150}, 50-percentile is reported to be 50. Although, 100 seems a more appropriate return value.
One solution is to modify `SlaUtil` to perform an interpolation when the sample size is small or when the corresponding index to a percentile value is not an integer.