GRE Exam Logical Reasoning Decision Making and Problem Solving

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.

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GRE Other Question

21. In 2000, 5500 people attended the State B basketball tournament. The enrollment has been increasing 2% annually. Select the equation that would determine the total number of people who attend t years after 2000? 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