Two events are mutually exclusive if the occurrence of the one precludes occurrence of the other (both cannot occur simultaneously on any one trial).

Psychologists typically consider a result to be significant if it would be expected to occur by chance _______ times in 100 repetitions of the study

a. 5 or fewer b. 10 or fewer c. 20 or fewer d. 40 or fewer

To ensure objectivity, psychology depends on

a. the mathematical model. b. the scientific method. c. historical precedent. d. logic. e. sociopolitical significance.