do students at various colleges differ in how sociable they are? twenty-five students were randomly selected from each of three colleges in a particular region and were asked to report on the amount of time they spent socializing each day with other students. the results for college x was a mean of 5 hours and an estimated population variance of 2 hours for college y, m = 4, s2 = 1.5 and for college z, m = 6, s2 = 2.5. what should you conclude? use the .05 level. (a) use the steps of hypothesis testing, (b) figure the effect size for the study and (c) explain your answers to (a) and (b) to someone who has never had a course in statistics.