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 choose 20 students at random from the class and ask them for their age.He orders all students alphabetically by their first name.He then selects every 10th person on the list to be in his sample.This sampling method is called a

A) Cluster Sample.
B) Simple Random Sample.
C) Voluntary Sample.
D) Stratified Random Sample.
E) Systematic Random Sample.

Question

Pranav Moholkar · Accepted Answer

Final Answer : E, Explanation :  The sampling method described is a Systematic Random Sample, where the instructor orders the students alphabetically and selects every 10th person on the list to be in the sample. This method ensures each student has an equal chance of being selected and is less time-consuming than a Simple Random Sample of 20 students from the class of 200.

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