Why is it important that a population be selected at random when conducting polls?

Question

Quizplus · Accepted Answer

Without a random sample, the poll would be considered unscientific and therefore invalid. Random sampling ensures that every member of the population has an equal chance of being selected, which helps to reduce bias and increase the accuracy of the results. It also allows for the use of statistical techniques to estimate the margin of error and the level of confidence in the results, which is important for understanding the reliability of the poll.

Why Is It Important That a Population Be Selected at Random