Dependent Samples ttest Practice Problem We want to know whether an independent variable (room temperature) affects scores on a dependent variable (ratings of anger). The levels of the IV are hot and cold and the DV is measured on an anger scale (ranging from 0 no anger to 10 high anger). In the experiment, each subject provides one anger rating in the hot room and another anger rating in the cold room. The samples are said to be. because the subjects are providing responses in the hot and cold rooms. The data: SubjectHot room 1 5 2 8 3 5 4 T 6 8 9 10 6 Cold room xar24 3 2 6 4 4 Difference Use a = .05 to test the hypothesis that room temperature will influence anger ratings.