Fill in the blanks In an article exploring blood serum levels of vitamins and lung cancer risks (The New England Journal of Medicine), the mean serum level of Vitamin E in the control group was 11.9 mg/liter with standard deviation 4.30 mg/liter. There were 196 patients in the control group. (These patients were free of all cancer, except possibly skin cancer, in the subsequent 8 years). Using this information, find a 95% confidence interval for the mean serum level of vitamin E in all persons similar to the control group.(3 decimal places) E = lower limit = upper limit =