We consider the legacy of Martin Luther King Jr.
How Much Should We Trust Political Poll Results?
Now that the dust has settled on Arizona’s August primary, expect to be inundated with more numbers — most of them from polls.
We’ll hear more about margins of error, undecided voters and try to figure out the polling methods used and whether the organization conducting the survey has a particular political leaning.
Anthony Salvanto of CBS immerses himself in the numbers as the network’s elections and surveys director, and he explains his approach in the new book, "Where Did You Get This Number? A Pollster’s Guide to Making Sense of the World."