Zocat

Short version: It's about how the survey was done (from a math perspective). Bit longer (also more math): 2 stratified means (iirc) that you have your poll results (1st sample) and then select a 2nd sample from within the first sample and use this 2nd sample for your statistic. This is done to prevent a certain bias from your selection method. i.e. if you did your 1st sample at 10am in a supermarket, you would probably get almost no children (they're at school), and not a lot of the working population (they're at work). So to be still representative you select your 2nd sample to be certain age groups, certain occupations, gender, and randomly chose people fitting those criterias from the 1st sample. "Sampling Error: ± 1.5" Just is the possible error which can occur when using your polled population. So it's i.e. possible that T-ara (which are listed at 5.5%) could actually be as high as 7% (5.5+1.5) or as low as 4% in the reality. This also applies to everybody else in this poll. But the actual result is very likely (see below) to be within 7% and 4%. 95% confidence interval means, that the result is correct in 95% of cases. Keep in mind they only asked 4,157 people and they're extrapolating from those people to the whole population. In 95% of cases of a survey done with the same method (asked population, result, ...) is going to be a correct representation of the whole population. 95% is a normal number for confidence intervals, others are 99% (or even higher if it's something critical, where i.e. lives depend on it). You can fit in a higher confidence interval by increasing the asked population. It basically just says "We're 95% sure that our result is correct".

It was only a random (or not so random^^) PD from SBS - not the head of SBS. He (the PD) already retracted his statement & apologized.

He's stupid. At least wait 1-2 days before making such an announcement. Apparently he thinks long about the whole issue (Hwayoung) and then sadly comes to the conclusion to terminate her contract. Then a few hours later he suddenly changes his mind. Yeah, really convincing that he thinks about this issue Joke CEO as always.