Its not working for me, please help

3. The fear of negative evaluation (FNE) scores for 11 female students known to suffer from the eating disorder bulimia and 14 female students with normal eating habits are presented below. In this question, we will compute a 95% confidence interval for /1 -/2, the difference of the population mean FNE scores for bulemic and normal female students respectively. Bulimic Normal 21 21 13 18 13 24 6 11 13 16 19 20 14 13 7 25 8 10 19 19 15 16 23 20 (a) Treating the bulimic and normal groups as populations one and two respectively, calculate y1, $1, 12 and $2. You can just write out these values. You do not need to copy and paste the code. (b) Calculate sp and the standard error of y1 - 12. (c) Provide the appropriate t-curve critical value for constructing a 95% confidence interval for #1 - /2. (d) Provide a 95% confidence interval for /1 - /2