GRE Exam Verbal Ability Miscellaneous

34. At a particular company, every employee receives a 4% cost-of-living increase to their salary.

What impact does this cost-of-living increase have on the mean and on the range of employee salaries at the company?

a. The mean increases but the range does not change.
b. The mean does not change but the range increases.
c. The mean and range both increase.
d. The mean and range do not change

Read Solution (Total 1)

let, the range of salaries be rs.50 - rs.100.
the mean is rs.75.
4% increase in the salary means the range becomes rs.52 - rs.104.
the mean is rs. 78.
so, both the mean and range increase.
(c) is correct.
9 years agoHelpfull: Yes(1) No(0)

GRE Other Question

33. A college professor at the University of Washington surveyed 150 students at the university. The students were asked if they prefer in class or take home tests. The professor drew the conclusion: “One out of four college students prefer take home tests.” Explain why this conclusion is misleading.
a. The professor surveyed a small sample of the population at one university but made the conclusion about the entire population of college students.
b. The survey question was biased toward in class tests.
c. The students were not selected randomly.
d. The sample size was too small.
7. Which of the following pieces of information can be obtained from a box-and-whisker plot?

A. the mean of a data set
B. the number of values in the data set
C. the median of the data set
D. the mode of the data set