A researcher is correlating gender (male/female) with whether or not people have had sexual intercourse (no/yes). What kind of correlation should he use?
a. rank-order
b. partial c. phi
d. point biserial
e. multiple
Question 2
If women and men participate in a study on mathematics performance, we might expect that women would do as well as men on math problems if
a. the women and men are tested in same-sex groups.
b. the researcher points out that the women should disregard the stereotype that women are not as proficient because it isn't true.
c. the investigator treats sex differences in math performance with gentle humor.
d. the women are strongly encouraged to do their best on the math problems.
Subadult male lion and spotted hyena in the Masai Mara
Male Orange Tip
Red-crested Pochard - female
Sexual Selection: Elephant Seals
Sexual Selection: Birds of Paradise