I have a (for me tricky) statistic exam question and can't find the answer. All I know is the information which I post here. Here we go ...
A research company asked 1000 participants which party they would vote in the next election. The calculated CI is [31,53;36,47]. Unfortunately, the research company forgot to tell the company which α level they used. "Calculate" the α level (or do whatever necessary to find the α ;) )
The answer is 10% but I have no idea how to get it ...
Thx in advance!