10.35 [EX10-035] In reference to the college students who participated in a learning community in Exercise 10.34, a control group of students was also formed for testing and comparison. Ten randomly selected college students, who were not involved in the learning community, were given pre–self-esteem and post–self-esteem surveys. The scores on the surveys for the control group are as follows:

Student 1 2 3 4 5 6 7 8 9 10 Prescore 19 23 12 20 26 20 15 10 22 12 Postscore 19 21 9 10 23 20 19 10 21 19 Does this sample of students show sufficient evidence that self-esteem scores were higher after participation in college courses? Lower scores indicate higher self-esteem. Use the 0.05 level of significance and assume normality of scores.