Quiz: Statistics

1. Which of the following measures of central tendency involves dividing by how many values there are?
a. mode
b. mean
c. median
2. Arrange the numbers in numerical order and see which is repeated most often. This describes which measure of central tendency?
a. mode
b. mean
c. median
3. Which measure of central tendency is the least used?
a. mode
b. mean
c. median
4. Which measure of central tendency is commonly called the “average”?
a. mode
b. mean
c. median
5. What is the mean of 17, 10, 16, 17?
a. 17
b. equation
c. 15
6. What is the mode of 17, 10, 16, 17?
a. 17
b. equation
c. 15
7. What is the median of 17, 10, 16, 17?
a. 17
b. equation
c. 15
8. Use the set {5, 7, 5, 1, 7, 5, 5} to answer the question that follows.
  • Which of the following is true?
a. The mean is larger than the median.
b. The mode is larger than the mean.
c. The median, the mean, and the mode all have the same value.
9. If the mean of 8 scores is 12, then which of the following MUST be true?
a. All the scores added together must be more than 90.
b. At least 3 scores are less than 12.
c. Both A and B must be true.
10. If all tests have equal value, then what would be the mean of 4 tests averaging 60% plus 6 tests averaging 70%?
a. less than 65%
b. 65%
c. more than 65%
11. If 4 people each weigh 85 pounds and 8 people each weigh 90 pounds, then what is the average weight for all 12 people?
a. equation
b. equation
c. 88.4 pounds

Use the table of values below for question 12.

line art

12. What is the median for the monthly rainfall totals?
a. 12
b. 14
c. 15
13. A student has a mean of 70% on her first 4 tests. What must she get on the fifth test so that her mean will now be 75%?
a. 80%
b. 90%
c. 95%
14. Set A consists of the numbers 12, 15, 37, 10, and 11. Set B consists of the numbers 3, 58, 17, and 7.
  • Which of the following is true?
a. The median of set A equals the median of set B.
b. The mean of set A equals the mean of set B.
c. Both A and B are true.
15. Set Q consists of the numbers 4, 10, 12, 7, 19, 10, 5, and w. For what value of w will the mode, the median, and the mean all be equal?
a. 13
b. 17
c. 21

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