(27 Mar 2014, 7:41 pm)eezypeazy wrote You're still not able to understand sampling, are you? And how samples are representative? And how the same technique has been rigourously applied across the country?

Apparently not...

Although Leslie Kish does.
According to a book of his, which I happen to have close to hand (why would I have that, if I fail to understand sampling?), there are four basic problems when undertaking a sampling frame.
How many occurred in this survey?

1. Missing elements: Some members of the population are not included in the frame.

2. Foreign elements: The non-members of the population are included in the frame.

3. Duplicate entries: A member of the population is surveyed more than once.

4. Groups or clusters: The frame lists clusters instead of individuals.

We all appreciate how much you know about sampling, but there are at least two, possibly three, maybe even four of those issues within the survey you linked to in the original post.

Because you know so much, I wont bore you with details from a book written by Louis Rea and Richard Parker, where they outline a perfect example of cluster sampling carried out on bus passengers in the USA or how those passengers could have been utilised better under a stratified plan instead...

But going back to your original comments/questions - I hope that isn't you making those wild, generalised, ill thought out comments you often accuse me of there eezypeazy?