1. Which of the following statements regarding statistical analysis in research are true? A Range is the value with the highest frequency observed. B Unpaired t-test is used to compare two groups which are numerical and normally distributed. C A confidence interval which includes zero usually implies a lack of statistical significance. 2. Which of the following questions should be answered before undertaking research? A Why do the study? B Will it answer a useful question? C Will there be any financial incentives? D Is it practical? E What impact will it have?