Skip to content

Liars, damned liars and statistics

Nate Silver over at fivethirtyeight.com gives some context to the oft repeated claim that the surge in minority voters is responsible for the passage of proposition 8 in California:

Certainly, the No on 8 folks might have done a better job of outreach to California’s black and Latino communities. But the notion that Prop 8 passed because of the Obama turnout surge is silly. Exit polls suggest that first-time voters — the vast majority of whom were driven to turn out by Obama (he won 83 percent [!] of their votes) — voted against Prop 8 by a 62-38 margin. More experienced voters voted for the measure 56-44, however, providing for its passage.

Now, it’s true that if new voters had voted against Prop 8 at the same rates that they voted for Obama, the measure probably would have failed. But that does not mean that the new voters were harmful on balance — they were helpful on balance. If California’s electorate had been the same as it was in 2004, Prop 8 would have passed by a wider margin.

Furthermore, it would be premature to say that new Latino and black voters were responsible for Prop 8’s passage. Latinos aged 18-29 (not strictly the same as ‘new’ voters, but the closest available proxy) voted against Prop 8 by a 59-41 margin. These figures are not available for young black voters, but it would surprise me if their votes weren’t fairly close to the 50-50 mark.

Proving once again that it’s easy to mislead with statistics. The trick is to look at the statistics that are truly relevant to the point in issue.


One Comment