00:01
Hello students, let's solve this problem.
00:02
The problem says calculate the s -s -cp, that is some of the square of the cross -product matrix, and find s the sample covariance matrix.
00:20
So it is given a number and of x1, x2, x3.
00:28
So these numbers are 1, 2, 3, 3, 4, 747, and this one is 6 -5 -4.
00:40
These data are given.
00:44
So we have to solve this problem so that a is given here.
00:50
So a you can write down that is the matrix of 324 -747 -657.
01:00
As well as a tannospose that is given here so the row changes into column so 376 245 474 so that is a tannospose now sum of the square and the cross product of s cp so s s cp that is is equal to a tanspose multiplied with a so if you do this tallyspose, so that we get here after multiplying 29, 57, 44, 57, 114, 90, and then 44, 47, and then 44, 90, and of 77.
01:55
So this is a tanspose of a.
01:58
Now next we have to find out that the sample covariance matrix of s, so that this s is equal to s -s -cp divided by n -minus 1, so that s is equal to s -s -cp, n is equal to 3 minus 1, so that is -s -c -p divided by of 2...