3.12 Rules of Thumb

Let's practise our new Rule of Thumb for Polls

http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=10908241


http://www.statschat.org.nz/2011/10/25/all-about-election-polls/ to prepare us.

Can you find the following:
The sample size?
Construct the margins of error for all the proportions provided?
Construct the 95% confidence interval for these proportions?
What claims are made?
Are they valid?
Do you need the actual formulae, rather than the rule of thumb, for any of the above?
What are you learning?