A Statistics instructor wishes to know the average age (in month)of his 200 students.He is too lazy to sample all 200 students so he decides to collect the ages for the first 20 students to yell out their ages.This sampling method is called a

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This sampling method is a voluntary sample, as the instructor is relying on the first 20 students to voluntarily yell out their ages. This method is not representative of the entire population and is prone to bias, as students who are more likely to volunteer their age may have different ages than those who do not. A simple random sample or stratified random sample would be more representative and less biased, but the instructor did not use either of these methods. A cluster sample involves dividing the population into groups and randomly selecting groups to sample from, and a systematic random sample involves selecting every kth member of the population.

A Statistics Instructor Wishes to Know the Average Age (In