问题
单项选择题
The owner of a company has recently decided to raise the salary of one employee, who was already making the highest salary in the company, by 40 percent. Which of the following value (s) is (are) expected to be affected by this raise（）
A. median only.
B. mean and median only.
C. mean only.
答案
参考答案：C
解析：
Mean is affected because it is the sum of all values/number of observations. Mode is not changed as it measures the value that occurs most frequently. Median is also not affected as it the midpoint between the top half of values and the bottom half of values.