How are scientific polls better to conduct than "people-in-the-street" interviews (aka straw polls) or opt-in internet surveys?

a. Scientific polls offer more questions; the greater the number of questions, the more accurate the results.

b. Scientific polls select subjects randomly; this prevents biased samples and results.

c. Scientific polls are quicker; faster polls reduce respondent fatigue and allow more people to be polled.

d. Scientific polls are significant cheaper than polls conducted by private organizations, like news networks

 

Answer:

B. Scientific polls select subjects randomly; this prevents biased samples and results.

Step-by-step explanation

The key advantage of scientific polls is that they account accurately for diverse demographics. Businesses, politicians and organizations may want to know how a specific sector of the community feels, or how the community in general will respond to poll questions. Scientific polling gives the option of focusing on a specific, targeted group, or expanding to include a representative sampling of the community. This means more accurate results and less bias on the part of pollsters because it reduces the possibility of human error due to prejudice.

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