Minimum number of times per lost message that a receiver transport
transmitted a NAK. (LBT-RM, LBT-RU)

- n (Int32)
- Statistics set index

Minimum number of times per lost message that a receiver transport
transmitted a NAK, i.e., the lowest value collected so far.

A value greater than 1 indicates a chronically lossy network.
This method returns a value from the nth set of statistics
encapsulated within this object.