Assertion: poll | /r/HasProperty | scientific
Facets:
Source sentences:
text: By contrast, professional polling companies use a variety of techniques to attempt to ensure that the polls they conduct are representative, reliable and scientific.
text: However, many polls are unscientific, such as most online polls you take using a computer, telephone surveys in which you must call a certain number, or mail-in questionaires in magazines or sent to you by charities.
text: If the poll is a scientific one, then an effort has been made to either choose the sample randomly from the population, or to weight it in order to make it representative of the population.
text: Opinion polls are generally conducted with statistical selection controls in place and are thus called "scientific", while straw polls and honor-system polls are conducted among self-selected populations and are called "unscientific".