For each of the following, (a) indicate what two populations arebeing compared,

Question

For each of the following, (a) indicate what two populations arebeing compared, (b) state the research hypothesis, (c) state thenull hypothesis, and (d) say whether you should use a one-tailed ortwo-tailed test and why.

1. Do Canadian children whose parents are librarians do betterthan Canadian children in general on reading ability?

2. Is the level of income for residents of a particular citydifferent from the level of income for people in the region?

3. Do people who have experienced an earthquake have more orless self-confidence than the general population?

4. Based on anthropological reports in which the status of womenis scored on a 10-point scale, the mean and standard deviationacross many cultures are known. A new culture is found in whichthere is an unusual family arrangement. The status of women is alsorated in this culture. Do cultures with this kind of unusual familyarrangement provide higher status to women than cultures ingeneral?

Explanation / Answer

1. Null Hypothesis: Canadian children whoseparents are librarians does not better than Canadian children ingeneral on reading ability Alternative Hypothesis: Canadian children whoseparents are librarians do better than Canadian children in generalon reading ability One tailed test 2. Null Hypothesis: level of income forresidents of a particular city is not different from the levelof income for people in the region Alternative Hypothesis: level of income forresidents of a particular city different from the level of incomefor people in the region Two tailed test 3. Null Hypothesis: people who have experiencedan earthquake does not have more or less self-confidence than thegeneral population Alternative Hypothesis: people who haveexperienced an earthquake have more or less self-confidence thanthe general population Two tailed test 4. Null Hypothesis: cultures with this kind ofunusual family arrangement does not provide higher status towomen than cultures in general Alternative Hypothesis: cultures with this kindof unusual family arrangement provide higher status to women thancultures in general One tailed test

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