In this election fever, beware of biased surveys

(Note: This is the Sept. 30, 2021 Republic Service column that should have been published instead of a past article. Ric Saludo regrets the wrong publication that resulted from a technical error.)

There were recent headlines about the Social Weather Stations (SWS) poll asking 1,200 randomly selected respondents, statistically representing more than 70 million voting-age Filipinos, about President Rodrigo Duterte's decision to run for vice president in the May 2022 elections. Sadly, it was a faulty poll.