Question: 1. List the tests presented so far in this chapter and the design for which each is appropriate. Be sure you can do this from memory.
2. For each situation described, tell whether you would use a Mann-Whitney test, a Wilcoxon matched-pairs signed-ranks test, a Wilcoxon-Wilcox multiple-comparisons test, or an rs.
a. A limnologist (a scientist who studies freshwater streams and lakes) measured algae growth in a lake before and after the construction of a copper smelting plant to see what effect the plant had.
b. An educational psychologist compared the sociability scores of firstborn children with scores of their next-born brother or sister to see if the two groups differed in sociability.
c. A child psychologist wanted to determine the degree of relationship between eye-hand coordination scores obtained at age 6 and scores obtained from the same individuals at age 12.
d. A nutritionist randomly and evenly divided boxes of cornflakes cereal into three groups. One group was stored at 40°F, one group at 80°F, and one group alternated from day to day between the two temperatures. After 30 days, the vitamin context of each box was assayed.
e. The effect of STP gas treatment on gasoline mileage was assessed by driving six cars over a 10-mile course, adding STP, and then again driving over the same 10-mile course.