The dataset consists of data collected from a random sample of 60 students from one instructor in Stat 30100.Thirty students were randomly chosen from the online class and 30 were chosen from the traditional face-to-face class.The variables recorded are the student's final grade percentage in the course, the amount of time they spent on their Study Plan in MyStatLabs, the number of Mastery Points they achieved at the end of the semester, and what type of class they are in.

1.)Is the source of the data biased?