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Figure 4: Comparison of pretest and posttest scores for control and test groups as mean percentage of correct answers with standard deviation. *Test group mean percentage of correct answers posttest (86%) score was significantly higher than pretest (68%) score (P = 0.01, ttest). ^{ns}Control group mean percentage of correct answers pretest (76%) and posttest (76%) scores were not statistically significant (P = 1.00, ttest) 
