Historically, in the early to middle 1900’s, households that had a telephone in their home were considered to earn an above average annual income.

in 1948, pollsters famously predicted that dewey would beat truman for the presidency because dewey was ahead in telephone polls. what bias led them to make the wrong prediction?

a) they only called on tuesdays
b) many people did not have telephones
c) they worded the question to favor dewey
d) truman supports would hang up