00:01
Here we are looking, we're looking at p values.
00:04
So a p value is a measure of probability.
00:07
You'll get a p value as a result of some kind of statistical test you've done.
00:13
And usually, when we're talking about significance, we're talking about p is less than 0 .05 or 0 .01 or 0 .1.
00:22
What it means is that the probability, that the differences between two groups is down to pure chance, is less than in this case, 0 .05.
00:35
So we're looking at differences and whether they show a true difference.
00:55
So if you have a population and you think the average of it is, say, 10, and you take a sample and the sample average is 12, does that mean that the population average is not 10, but it's closer to 12? what does it mean that it was just chance? it's just something that happened and it's okay for the sample to be different.
01:21
Well, for that, you do a statistical test, you get a p value, and you decide based on your p value if your results are statistically significant.
01:31
So for the first question, question 13, we have p equals 0 .043.
01:39
This is less than 0 .05.
01:43
So we have significant at that level, but it's more than 0 .01...
