The problem with 美丽岛民调, it is all based on homelines.
Only 53% of the population has home telephones. The ones that stay at home to pickup phones during normal working hours or even before 8 PM are more likely to be elderly.
Refer wiki to for all the research.
https://zh.wikipedia.org/zh-sg/2024年中華民國總統選舉民意調查
The ones with 市话+手机 more likely to be accurate.
What is Random Sampling
Random sampling is a part of the sampling technique in which each sample has an equal probability of being chosen. A sample chosen randomly is meant to be an unbiased representation of the total population. If for some reasons, the sample does not represent the population, the variation is called a sampling error.
i understand how 美丽岛民调 do their survey. but i think based on past record they are quite accurate.
