For each of the following a say which two populations are be

For each of the following, (a) say which 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. Do Canadian children whose parents are librarians score higher than Canadian children in general on reading ability? Is the level of income for residents of a particular city different from the level of income for people in the region? Do people who have experienced an earthquake have more or less self-confidence than the general population?

Solution

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	Populations Compared		Research Hypothesis	Null Hypothesis	one-tailed or two-tailed
	1	2
1)	Librarian Parent\'s Kids	Rest of the canadian kids	LPK score > RCK score	LPK Score <= RCK score	one-tailed test
2)	income in a city	income in rest of region	IC = Inc. in rest	IC = Inc. in rest	two-tailed
3)	Self-confidence in Earthquake victims	Self-confidence of others	EQ-Victims > or < others	EQ-Vctims = Others	two-tailed