A statistics instructor wants to measure the effectiveness of his teaching skills in a class of 102 students (N =102).

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/her a questionnaire. 

Is this sample design an example of random sampling? Explain.

Assuming that all students attend his class that day, how many students will he select to complete his questionnaire?