For each of the following,
(a) Say which two populations are being compared.
(b) State the research hypothesis.
(c) State the null hypothesis.
(d) Say whether you should use a one-tailed or two-tailed test and why.
i. Do Canadian children whose parents are librarians score higher 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?