Scottish Independance and Nivea Skin Cream

So, what can read from the weekend's various opinion polls? One quite in favour of Yes, and another quite in favour on No.
However, the poll giving a majority Yes has been rubbished, on the grounds that there was only a sample of 705 compared with the other's 1,000. The Yes poll was deemed to be unrepresentative.
Now from what I recall from my days of dealing with statistics, both samples are unrepresentative. I seem to recall that you needed a sample of at least 1,900 when dealing with polls of this ilk before you could start talking turkey with any form of authority.
Sampling size is important. I play a lot of Spider Solitaire on the PC. Over any given run of 30 consecutive games, I can average as high as 55% or as low as 30%, depending on the cards. But over 100 games, I'm consistently achieving between 40 and 49% (and yes, I'm mad enough to keep records)!
Which brings me onto a particular bugbear of mine - L'Oreal hairspray and Dove moisturiser, etc. All those TV adverts flash up in the small print "87% of 131 women agreed that this product gave extra volume", and so on. Absolute baloney if you're coming at it as a statistician. I'm amazed that the Advertising Stands Agency aren't all over them.
Anyway, can't stop on here to talk to you good folk. A recent survey of 1 Ostrich found that 95% of it was about to head for the biscuit barrel. The other 5% is going along for the ride .....
However, the poll giving a majority Yes has been rubbished, on the grounds that there was only a sample of 705 compared with the other's 1,000. The Yes poll was deemed to be unrepresentative.
Now from what I recall from my days of dealing with statistics, both samples are unrepresentative. I seem to recall that you needed a sample of at least 1,900 when dealing with polls of this ilk before you could start talking turkey with any form of authority.
Sampling size is important. I play a lot of Spider Solitaire on the PC. Over any given run of 30 consecutive games, I can average as high as 55% or as low as 30%, depending on the cards. But over 100 games, I'm consistently achieving between 40 and 49% (and yes, I'm mad enough to keep records)!
Which brings me onto a particular bugbear of mine - L'Oreal hairspray and Dove moisturiser, etc. All those TV adverts flash up in the small print "87% of 131 women agreed that this product gave extra volume", and so on. Absolute baloney if you're coming at it as a statistician. I'm amazed that the Advertising Stands Agency aren't all over them.
Anyway, can't stop on here to talk to you good folk. A recent survey of 1 Ostrich found that 95% of it was about to head for the biscuit barrel. The other 5% is going along for the ride .....
