Adam attends a college that offers both traditional and online programs and he wants to find out the proportion of students that have outside employment. Adam decides to walk around campus at different times on certain days and randomly select students he met and ask their courses format and whether they have outside employment. Suppose he could get an answer from every student he asked, what type of bias could result from such a sample? Adam attends a college that offers both traditional and online programs and he wants to find out the proportion of students that have outside employment. Adam decides to walk around campus at different times on certain days and randomly select students he met and ask their courses format and whether they have outside employment. Suppose he could get an answer from every student he asked, what type of bias could result from such a sample? Volunteer bias, since students themselves choose to answer the question. Nonresponse bias, since a relatively large number of students may refuse to respond. No obvious bias Undercoverage, since this method is not likely to include students who take online classes only