STAT 371 Lecture 4: statistics lecture 4

2. Suppose that C is a mxn matrix D is a pxq matrix, F is a r X s. Assume that the matrix CDT +CFT is well defined. Which of the following is true? (A)m=n=s=q and p=r B) m =n=p=q=r=s. C) m=n=p=s and q=r. D) m = p=n=. E) None of the above.

8. Suppose that A is a n xm matrix B is a p xq matrix, C is a r x s. Assume that the matrix B2A + BCT is well defined. Which of the following is true? A) n = m =p=q=r=s. B) n = m = p = s and q = r. (C) p = q = n = s and m = r D) q = p = m = r = s. E) None of the above.

8. Suppose that A is a nxm matrix B is a pxq matrix, C is a r X s. Assume that the matrix B2A + BC is well defined. Which of the following is true? A) n = m = p =q=r=s. B) n = m = p = s and q = r. (C) p = q = n=r and m = s D) q = p = m = r = s. E) None of the above.