Quote:
Originally Posted by Zunaid
They used random sampling. The sample set was large enough to have low error bars. But the problem was that they only sampled currently elected MPs. 
|
Are you serious with the last part?
Here is the methodology from Gallup:
http://www.gallup.com/poll/154625/So...oval-Asia.aspx
Survey Methods
Results are based on face-to-face and telephone interviews with approximately 1,000 adults, aged 15 and older, conducted between April 5 and Dec. 4, 2011, in the 21 countries identified in the article. For results based on the total sample of national adults, one can say with 95% confidence that the maximum margin of sampling error ranges from ± 2 percentage points to ±4 percentage points. The margin of error reflects the influence of data weighting. In addition to sampling error, question wording and practical difficulties in conducting surveys can introduce error or bias into the findings of public opinion polls.
For more complete methodology and specific survey dates,
please review Gallup's Country Data Set details.
Here is the PDF:
http://www.gallup.com/file/se/128171...03-28-12rp.pdf
For BD it was face-to-face in Bengali, conducted between apr 15 to 30th 2011 with a margin of error of 3.4. The 'design effect' was 1.23 : The design effect calculation reflects the weights and does not incorporate the intraclass correlation coefficients. Design effect calculation: n*(sum of squared weights)/[(sum of weights)*(sum of weights)]
and the margin of error: Margin of error is calculated around a proportion at the 95% confidence level. The maximum margin of error was calculated assuming a reported percentage of 50% and takes into account the design effect. Margin of error calculation: √(0.25/N)*1.96*√(DE)