Jane’s scores on six math exams were as follows:
84.5, 88.0, 92.5, 89.5, 94.0, 90.0
What is the mean of her scores?
a. 88.5
b. 89.75
c. 90.25
d. 90.75
Answer : b
Explanation:The mean value of any set of numbers indicates the average of those numbers. The average of the numbers is calculated by adding all the numbers and dividing them by how many times they occurred. For this example it will be as follows:
84.5 + 88.0 + 92.5 + 89.5 + 94.0 + 90.0 = 538.5
538.5 / 6 = 89.75
(see post 08-31)
For additional information on this subject go to : How to Find the Mean
©Copyright 2007.Najwa S. Hirn. All rights reserved.
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