It was purely factual: over which time interval T is the modern variation (average slope on -LSB-- T; 0]-RRB- outside the statistical distribution of the same quantity computed over all past intervals -LSB-- t - T; - t]? (realclimate.org)
To verify this conjecture, we calculated the monthly average roll cost of the S&P 500 ® VIX Short - Term Futures Index as the monthly average slope between the first - month futures and the second - month futures. (indexologyblog.com)
Across the region, the average slope of the land dropped by more than 10 degrees post-mining. (sciencedaily.com)