Sources of polling error can include

Question

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All of these factors can contribute to polling error. Random telephone polling can miss certain groups of people who do not have landlines or who do not answer calls from unknown numbers. Unrepresentative samples can skew results if a certain group is over or underrepresented in the sample. Respondent's lack of knowledge or interest in the issue can lead to inaccurate responses or non-responses. Question wording can also affect results if it is unclear, leading or biased in any way. Therefore, all of the options listed can contribute to polling error.

Sources of Polling Error Can Include