1. Profile photo of Pamela says

    Thank you very much for the lessons very helpful.
    I am still not quite clear the difference between Stratified and Multistage sampling, as in both you need to divide or split in group. However, it looks to me that if the question mention the word “proportion” or “percentage” it will be definitely Stratified. Am I correct?
    Thank you in advance for your help.

  2. Profile photo of Farzana sultana says

    it is really helpful. i m gonna sit for the exam on 17th.last time i could not pass as i only read the study book n tried the practice kit may b.only yesterday i found ur opentution website.n now i m able to understand many things which i did assume first time.i m happy to have this lectures. is there any suggestion for me to pass in the exam as i hv very little time.

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