Reducing Sampling Error in Public Opinion Polls
Which of the following trends best reflects historical efforts to lower sampling error in public opinion polls?
A
Applying subjective judgments to adjust poll results without statistical backing.
B
Relying on face-to-face interviews exclusively as the sole method of polling.
C
Reducing survey questions to a minimum to save time regardless of representativeness.
D
Increasing the number of survey respondents to improve the reliability of statistical estimates.
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