A researcher is conducting research on using technology in teaching. The researcher has two groups. The first group receives instruction via a PowerPoint presentation that is online. The second group attends a class and receives instruction from a teacher face to face. The researcher classifies the students based on when they volunteer for the study. The first 50 students who volunteer receive online instruction. The next 50 receive instruction by attending a class with a teacher. With respect to this study, we could identify that:

This study is poor because the researcher did not use random sampling.

Explanation:

Random sampling: In research, the term "random sampling" is determined as one of the different parts of a sampling technique whereby each sample gets an equal or same opportunity of being chosen in an experiment or research. Therefore, a specific sample that is being chosen randomly from a population is supposed to be an "unbiased representation" of the given population.

In the question above, with respect to the given study, it could be identified that "this study is poor because the researcher didn't use random sampling".