- Which one of the following function is the average of certain values? (n is the number of values)

- If there is an odd number n of values, which one of the following is the median of certain values?

- Table above gives the number of hazardous waste sites on the U.S. National Priority List that are in each of 15 centrally located states, as of August 2011.

- According to the table, Which of the following is closest to the average value of number of sites among all states listed on the table?

- According to the table, answer question 4 and 5.

- What are the maximum, minimum, median and average values of the number of customers?

- which one of the following statements is true?

- Given two sets of data A1 and A2 with same average value, where n1 is the number of first set of data and n2 is the number of second set of data. Which one of the following statements is true?

- Given two sets of data A1 and A2 with same number of values, which is n1 = n2, where n1 is the number of first set of data and n2 is the number of second set of data. Which one of the following statements is true?

- What value should be computed before calculating the deviation?

- What is the difference between two normal curves with different standard deviation?

- Which one of the following is NOT the basic charateristic of normal curve?

- Suppose verbal reasoning GRE scores of 30 students are normally distributed with a mean of 150 and a standard deviation of 45. If one of those student scored 160, what is his z-score?

- Given two sets of test scores (out of 100), answer question 12, 13 and 14.

- What is the standard deviation of test scores of set A?

- If A score of 79 is taken from set B, what is the z-score?

- Comparing two sets of scores, which one of the following statement is correct?

- Which one of the following about z-score is NOT true?