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    Compare Populations: Research Hypothesis; Null Hypothesis; One Tailed vs. Two Tailed Test

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    3-8. For each of the following, (a) indicate what two populations are being compared, (b) state the research
    hypothesis, (c) state the null hypothesis, and (d) say whether you should use a one-tailed or two-tailed test and why.

    (i) Do Canadian children whose parents are librarians do better than Canadian children in general on reading ability?
    (ii) Is the level of income for residents of a particular city different from the level of income for people in the region?
    (iii) Do people who have experienced an earthquake have more or less self-confidence than the general population?
    (iv) Based on anthropological reports in which the status of women is scored on a 10-point scale, the mean and standard deviation across many cultures are known. A new culture is found in which there is an unusual family arrangement. The status of women is also rated in this culture. Do cultures with this kind of unusual family arrangement provide higher status to women than cultures in general?

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    Solution Preview

    What two populations compared:

    canadian progeny of librarians : all canadian children
    residents of specific city: residents of region inclusive of city
    people at earthquake epicenter: general population inclusive of people who have been at epicenter
    members of unusual family arrangement: members of ...

    Solution Summary

    This solution is provided in 197 words. It lists populations compared, the hypotheses, and whether the tests should be one-tailed or two.