Is This Another Example of One Point Trending?
A National Transportation Safety Board press release said the following:
TRANSPORTATION FATALITIES DROP IN 2009;
PIPELINE AND MARINE DEATHS RISE
Washington, DC – Transportation fatalities in the United
States decreased by 9.2 percent in 2009 from 2008, according
to preliminary figures released today by the National
Transportation Safety Board.
The data indicate that transportation fatalities in all
modes totaled 35,928 in 2009, compared to 39,569 in 2008.
Although highway, rail, aviation, deaths declined, pipeline
and marine fatalities showed an increase.
Is this an example of one point trending?
What about lumping all sorts of transportation fatalities together? Couldn’t a decrease in one area cover up an increase in another?
After all, what is a significant increase or decrease in fatalities? How would you know?