00:01
So we're going to be examining the freshman 15 with a couple different cases.
00:07
We're going to look at the range, variance, and standard deviation of this phenomenon, and look at a sample of 18 students.
00:20
So our high minus our low is going to get us our range, and our high value is 11, and our low value is negative 5.
00:29
So that's going to give us a range of 16.
00:36
Next, we can get the variance out of this, but first we'll have to get the average.
00:42
So the average is the mean, and the mean is calculated by summing up each of our terms and dividing by the number of observations, which is 18.
00:54
And this is going to get us 1 .89.
01:00
So now we can go back up with our 1 .89 for our mean.
01:05
Plug that in right here.
01:08
So what we're going to get is our term, xi, minus 1 .89.
01:16
And then we're going to square that and do that over and over for all 17 remaining terms.
01:26
And then we're going to do that for 18 minus 1.
01:31
Divide that.
01:31
So it's going to get a 17 on the bottom...