First initial statement was dallas wasn't in bottom 1/8th. Since they are 6th from bottom 6>4 or 5.
Longer answer, rank ordering in a distribution ties will count as 1 place. All 5 teams with 0 wins are tied for 28th place (or 32nd). Percentile-wise, 100%*(1/8) = 12.5%. All five teams with 0 wins are at the 87.5% mark (100%-12.5%). Dallas is at 84.4%.
Not in the bottom 1/8th, positive spin to the thread. Even more positive spin...Dallas is within 2 std deviations of the normal playoff wins over the period wins ~95%. Barely missing the 1std dev of 68% by 0.22 wins. However, the skew does break that Gaussian