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| Occurs when the sample frame does not reflect the characteristics of the population. Can result from problems in sampling technique or with data-collection method. (I.E. asking people leaving a hockey game what thier favourite sport is.) |
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| Occurs when particular groups are under-represented in a survery, because they choose not to participate (I.E. People who can not respond to an e-mail survey). |
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Definition
| Occurs when data collection method consistently over/under-estimates a characteristic of the population. |
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| Occurs when participants in a survey deliberately give a false or misleading answer (I.E. People lie if the question is too personal. "Do you like butt sex?"). |
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| Questions where the answer is suggested in the question (multiple choice has this problem). |
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| Questions where the answer is suggested in the question (multiple choice has this problem). |
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Definition
| Questions with strong wording or slanted information to influence the respondents' answers (I.E. "Would you re-elect this government after their horrible performance during the last 4 years?"). |
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