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9 November, 12:37

1. Voluntary response samples often under represent people with strong opinions. 2. Convenience samples often lead to under coverage bias. 3. Questionnaires with non-neutral wording are likely to have response bias. 4. In an observational study we impose a treatment on the subjects. 5. The entire group of individuals we want information about is called the sample.

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  1. 9 November, 14:54
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    Check the explanation

    Explanation:

    1. False

    Voluntary response samples often over represent people with strong opinion.

    2. True

    Convenience samples often lead to under coverage bias.

    3. True

    Questionnaires with non-neutral wording are likely to have response bias.

    4. False

    In an observational study, we do not impose a treatment on the subjects.

    5. False

    The entire group of individuals we want information about iscalled the population.
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