A teacher has given four tests to a class of five students and stored the results in the following matrix

Discuss methods of matrix multiplication that the teacher can use to obtain the information indicated below. In each case, state the matrices to be used and then perform the necessary operations.
(A) The average on all four tests for each student, assuming that all four tests are given equal weight
(B) The average on all four tests for each student, assuming that the first three tests are given equal weight and the fourth is given twice this weight
(C) The class average on each of the four tests

Transcribed Image Text:

Testa 05 Ann「78 84 81 86 b 91 65 84 92 Carol 95 90 92 91 Dan 75 82 87 91 Enc L83 88 81 76