00:01
For this problem, let's see here.
00:02
The first thing that i'll note is that we have a fairly large sample size, n equals 1 ,000, so that's pretty good.
00:07
The next thing that we want to look at would be the sampling method.
00:11
We're told that they did a random online survey, which there's a little bit of a problem there because it would be talking about...
00:29
It's a little bit of a problem because it's still a voluntary thing, so there might be a little bit of self -selection bias, but it's not too much of a problem because the individuals were randomly selected.
00:39
We know that the individual sample, or that the sample was of visitors to the website over three months.
01:04
We know that the data collected was number of purchases over six months, or and we know that the conclusion made is about the same thing as the data was collected for...