Use to following results to complete an analysis of variance table, find the critical value, and determine whether to accept or reject the null hypothesis that there is no differ- ence in mean across the groups given ? = .05.
The critical F value is F.05,2,40 = 3.23. The observed value vastly exceeds this, so we clearly reject
the null hypothesis and conclude that the means differ across the groups.
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Random assignment
A) increases confidence that the groups are the same at the start of the study. B) is the best way to increase statistical power. C) is difficult to include in experimental designs. D) maximizes experimental variance.
_____________ are attachments to treaties that allow states to be excluded from the legal effects of certain provisions of the 1925 Geneva Protocol
A) Reservations B) Provisions C) Exceptions D) Conditions
The "participants'" subsection of "method" should include all of the following EXCEPT
a. how the participants were instructed. b. how participants were assigned to groups. c. how many participants were studied. d. how the participants were compensated for their participation.
Monarchies, authoritarian states, and democracies can be distinguished by:
a. Their geographic location b. The size of their winning coalitions c. Their emphasis on military spending d. The size of their selectorate