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Hello Sir,
I was attempting a question and came across options that were rather confusing. I tried myself but failed to reach a conclusion about what distinguishes both these Types and how it applies to the answer of this question.
The question being;-Appropriate which of the following best fits the statement between; Systematic Sampling and Stratified Random Sampling.
1. One person in ten is chosen from an alphabetical list of employees. (Answer: Systematic Sample)
2. Every 10th person is chosen randomly from each ward in a hospital. (Answer: Stratified Random Sample)Your help is greatly appreciated Sir! Many Thanks!
Have you watched my free lectures on this where I give examples of both?
I did watch the lecture on sources of data Sir. That’s under chapter 2 of the free lectures course. You give examples of stratified sampling based on gender and the systematic sample about asking every 100th person.
I do understand the difference between the two sir, all thanks to you and how brilliantly you’ve explained it. I do however find this particular question to be very misleading as it talks about selecting every 10th person from a hospital ward, randomly. I do understand that they have grouped the people under various hospital wards, that does lead one to think its stratified sampling but when they add the element of picking every 10th person, that adds a possibility of it being systematic sampling no?
Which then led me in further confusion about groupings done in the alphabetical order on people, the second statement, and they too are selected 1 in 10.
Its mind boggling to a point where I cant seem to determine what the fine line is that separates one type from the other in this particular scenario?
I hope I did not lead towards the impression that I’m asking you without having gone through your lectures Sir. My apologies if I did, I would’nt do that. 🙂
It is the word ‘random’ in the second statement that makes it a stratified random statement.
The first statement is not at all random when it is just picking every 10th item in a list (which is what the statement is implying).
Thank you So much Sir! You’ve helped clear a very disturbing ambiguity in my mind. Thank you so very much.
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