Question

a scientific poll uses what kind of sampling techniques?
o random
o self - selected
o small
o biased

Explanation:

A scientific poll aims for objectivity and representativeness. Random sampling gives every member of the population an equal chance of being selected, reducing bias. Self - selected samples can be biased as only those with strong opinions may participate. Small samples may not be representative, and biased samples defeat the purpose of a scientific poll.

Answer:

A. random