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We evaluate exam data from two independent samples of students (group A and B) at the end of a semester. The mean score for group A was 82% while the mean score for group B was 85%. Findings from an independent samples t-test (two-tailed, alpha 0.05) reveal the following:
Critical t: 2.04
T-statistic: 1.93
True of false: Based upon these findings, we can conclude the mean difference in exam scores was highly unlikely (<5%) due to chance and the difference is 'statistically significant'.