00:01
So here we have a deluxe model, which gives us our x1i, where i is 1 up to 7.
00:15
We have our standard model, which gives me the x2is, where i is 1 through 7.
00:29
And this is paired data because they come from the same retail outlet i.
00:36
And then my x di is the difference between the deluxe and the standard model from retail.
00:52
I'll let i, for i is 1 up to 7.
01:00
Then i can calculate x bar d, and the standard deviation for d.
01:09
Or for the differences.
01:11
So i put in my x1's in list 1, my x2's in list 2, and i calculate then list 3, which is the differences between x1i and x2i, and then i get my my mean difference so far was 3.
01:37
My mean difference is 8 .8571...