00:01
So, when we have selection bias, this is going to be a case where we have that the sample is not representative of the population.
00:23
One example of selection bias would be, for instance, how happy are you with the current tax plan, the current tax rates for a particular country? and then, if you only survey very low income individuals, they're likely going to have a different opinion about taxation than very, very high income individuals.
01:01
Another example, or another type of bias here, the response bias, this is going to be when we have that the participants provide, and i'll say specifically, participants provide inaccurate information.
01:30
So, for instance, having a survey question, especially one that is being done as an in -person, face -to -face survey, asking someone, do you use illegal drugs? people are, as i said, especially if they are in a face -to -face context, they're going to be much more likely to lie about whether or not they have used illegal drugs because of the stigma associated with illegal drug usage...