00:02
So in this question, we are told that there was a special report on polling, which basically shows how the results of a survey can be manipulated.
00:16
So some of the features that influence survey are things like number of possible responses, phrasing of the questions, sampling techniques, words that might mean different things to different people, questions that proceed and respondents offering opinions on issues they know nothing about.
00:42
So we're given a few cases here and we're asked about what that means in terms of manipulation.
00:53
So in our first case here, we're given the expression over the last few years.
01:01
So over the last few years, so these are words.
01:05
That may mean different things to different people.
01:10
So mean different things to different people.
01:28
So over the last years, do you think that this expression means the same time span to everyone? so no, it does not mean, it might not mean the same time span to everyone.
01:38
It might mean two years to someone, or it might mean five years to someone else.
01:47
It might mean five years to an older person and two years to a younger person.
01:57
And what would be a more precise phrase would be something like over the last three years would be a more precise phrase that takes into account the exact time frame in question.
02:16
Now let's move on to case b.
02:20
So in case b, the survey has the question, do you think fines for running stop signs should be doubled? and we're asked if the response is different if the question preceding that question is, have you ever run a stop sign? so yes, the question that is proceeding can actually bias the response of the first question because someone might be, who might have answered that fines should be doubled if there was only the first question, or rather only the second question, if someone had answered that the fine should be doubled, if they saw the previous question and if they answered yes, they ran a stop sign, then they might be more likely to switch their answer and say that fines should not be doubled, especially if they have run a stop sign before.
03:39
So yes, the responses would be likely to be different.
04:00
So responses likely to be if we have the question preceding the other question...