MA 110-07
§3.7-4.2 Quiz #7 score
Name:
10 April 2001
1. Two dice are rolled. Let Adenote the event that the sum of the two dice is even, and let B
denote the event that the sum of the two dice is odd. Are Aand Bindependent? Explain.
(7 points)
2. Students in a Finite Math course make the following scores on a test: 45, 59, 65, 72, 73,
79, 81, 84, 85, 89, 96, 98.
(a) Find the mean and the median test score. (6 points)
(b) If the cut-off scores for A, B, C, and D are 90, 80, 70, and 55, respectively, make a
frequency histogram and a relative frequency density histogram (two different bar
graphs) of the data. (7 points)