A study of bulimia among college women studied the connection between childhood sexual abuse and a measure of family cohesion (the higher the score, the greater the cohesion). The sample mean on the family cohesion scale was 2.0 for 11 sexually abused students (s = 2.1) and 5.1 for 24 nonabused students (s = 3.6). a. Find the standard error for comparing the means. b. Construct a 95% confidence interval for the difference between the mean family cohesion for sexually abused students and non-abused students. Interpret. a. The standard error se = (Round to four decimal places as needed.)