00:01
We're to find the variance.
00:02
So the first thing that we want to do is we want to find the mean or the average of your data.
00:08
So that would be, let's see.
00:12
That would be 147 plus 141 plus 120 plus 124 plus 128.
00:26
That would give you 660.
00:28
And there's one, two, three, four, five.
00:32
So divided by five gives me 132.
00:35
So that's my average or my mean.
00:39
So i'm going to take the mean, subtract it from each one of the data points, and then square it.
00:45
So that would be 132 minus 147 squared, plus 132 minus 141 squared, plus 132 minus 120 squared plus 132 minus 120 squared plus 132 minus 124 squared plus 132 minus 128 and squared so 132 minus 147 and then take that answer 15 squared would give you 225.
01:33
132 minus 141...