A statistics instructor wants to measure the effectiveness of his teaching skills in a class of 102 students (N = 102). He selects students by waiting at the door to the classroom prior to his lecture and pulling aside every third student to give him or her a questionnaire.
(a) Is this sample design an example of random sampling? Explain.
(b) Assuming that all students attend his class that day, how many students will he select to complete the questionnaire?