9. The following data represents hemoglobin values in gm/dl for 10 patients: 10.5 9 6.5 8 11 7 7.5 8.5 9.5 12 Is the mean value for patients significantly higher from the mean value of general population (12 gm/dl)? a) What is the most appropriate test? b) Formulate decision rule c) Calculate appropriate test statistics critical value