The accuracy of the population sample used for public opinion polls depends on

a. whether telephoning or direct contact is used to draw the sample.
b. the care with which questions are written and asked.
c. whether computers are used to draw the sample.
d. the factors of believability and reliability.
e. randomness of selection, size of sample, and variation in the population.

Ans: e. randomness of selection, size of sample, and variation in the population.

Political Science

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