Over the past few years the percentage of students who leave lakeland college at the end of the first year has increased. last year lakeland started a voluntary one-week orientation program to first-year students adjust to campus life. if lakeland is able to show that the orientation program has a positive effect on retention, they will consider making the program a requirement for all first- year students. lakeland’s administration also suspects that students with lower gpas have a higher probability of leaving lakeland at the end of the first year. in order to investigate the relation of these variables to retention, lakeland selected a random sample of 100 students from last year’s entering class. the data are contained in the data set named lakeland; a portion of the data follows. (file: lakeland)