Averages & Range Quiz
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5 questions, one answer each
Each answer is checked as you go, with why.
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1. Find the mode of: 3, 5, 5, 7, 8, 5, 9.
- A. 5
- B. 7
- C. 8
- D. 6
2. Find the range of: 12, 5, 19, 8, 3.
- A. 16
- B. 19
- C. 14
- D. 12
3. A frequency table has values 1,2,3 with frequencies 4,6,2. What is the mean?
- A. 1.83
- B. 2.0
- C. 1.5
- D. 2.33
4. Ordered data has lower quartile 12 and upper quartile 28. What is the interquartile range?
- A. 16
- B. 40
- C. 20
- D. 14
5. Why is the median sometimes a better measure of average than the mean?
- A. Because it is not distorted by extreme outlier values
- B. Because it always equals the mode
- C. Because it uses every value in the data set
- D. Because it is easier to calculate than the mean