A professor wants to compare the test scores of his two psychology classes (Class A and Class B). Each class has 20 students

The professor calculates a t value of 2.3 and concludes that Class B has a mean test score that is significantly higher than Class A. What is the effect size associated with this statistical test?
a. .12
b. .24
c. .35
d. .48

c

Psychology

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One conclusion that can be drawn from the Robbers Cave study is that

a. propaganda is not a particularly effective means of eliminating group conflict. b. imaginary competition does not lead to group conflict. c. the best way to reduce intergroup conflict is simply to bring group members together d. young boys exhibit greater aggressive tendencies than young girls.

Psychology

Ingrid holds the stereotype that girls who belong to sororities are not very smart. Suppose that she represses this stereotype most of the time, as she in fact wants to give everyone an equal chance before judging them. Despite her general well-intentioned efforts, in which case is she most likely to employ her stereotype?

a. When arguing with her friend Alice, who belongs to a sorority b. When having a good time with her friend Alice, who belongs to a sorority c. When having a good time with her mother, who once belonged to a sorority d. When watching a documentary film about the history of sororities in the U.S.

Psychology