A statistics instructor wants to measure the effectiveness of his teaching skill

Question

A statistics instructor wants to measure the effectiveness of his teaching skills in a class of 63 students (N- 63). 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) Assuming that all students attend his class that day, how many students will he select to complete the questionnaire? students (b) Is this sample design an example of random sampling? Explain. O Yes, because each student has an equal chance of being selected, and each student is replaced before selecting another student. O No, because each student is not selected at random, and each student is not replaced before selecting another student

Explanation / Answer

a) Since the questionnaire is given to every 3rd student and there are total of 63 students,

Number of students selected = 63/3 = 21

b) Option B is correct.

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