00:03
All right, in your question, you're supposed to determine which score indicates the highest relative position.
00:08
And basically, that's saying which score is the best relatively compared to the sample mean.
00:17
Obviously, numbers might differ, but relative to their mean, which score is best.
00:23
To do that, what we're going to do is calculate z scores.
00:27
Z scores are what we call standardized scores.
00:29
It standardizes numbers to the same scale.
00:33
So we take our z is found by taking our data value, in this case 3 .2, and then we subtract the mean 4 .5, and we divide by the standard deviation.
00:47
So we end up with 3 .2 minus 4 .5 divided by 1 .7.
00:58
And this first one gives me an approximately negative 0 .7...