00:01
For this problem, i'll first note that the sample variance is calculated as the sum of the deviations from the mean value squared divided by the sample size minus 1.
00:13
So the first step here is going to be to find the deviations from the mean value.
00:18
So i'll create just a little table here.
00:20
So we have our measurements.
00:21
7, 6, 5, 6, and 9.
00:25
We can find that the mean value is going to be, let's see here, 7 plus 6, 6, 3 .5.
00:30
Plus 5 plus 6 plus 9, then we divide that by 5.
00:36
6 .6 is the mean value.
00:39
We have x bar or xi minus x bar.
00:42
So we have 0 .4, 0 .6.
00:47
I'm not going to be concerning myself with the sign of this.
00:50
So actually technically i'm just writing down the absolute value of the deviation...