Read the following short passages and choose the best answers to the questions that follow each passage. A telephonic poll conducted in two states asked respondents whether they get adequate water during summers. Ninety-nine percent of respondents said their houses were having running water through-out the day. The pollsters published their findings, concluding that ninety-nine percent of all homes in India have adequate water for use. Which of the following most accurately describes a questionable technique employed by the pollsters in drawing their conclusions ?