Statistics & Probability Quiz

1. What is the mean of 4, 8, 6, 10, 2?

1. 10
2. 5
3. 6
4. 8

2. What is the median of 3, 7, 1, 9, 5?

1. 3
2. 5
3. 7
4. 9

3. What is the mode of 2, 4, 4, 6, 8, 4, 9?

1. 2
2. 4
3. 6
4. 9

4. What is the range of 15, 3, 22, 8, 17?

1. 14
2. 17
3. 19
4. 22

5. A bag has 3 red and 7 blue balls. What is the probability of picking red?

1. 1/3
2. 3/10
3. 3/7
4. 7/10

6. What is the probability of rolling a 6 on a fair dice?

1. 1/3
2. 1/4
3. 1/5
4. 1/6

7. What is the mean of 10, 20, 30?

1. 15
2. 20
3. 25
4. 30

8. If P(event) = 0.4, what is the probability it does NOT happen?

1. 0.4
2. 0.5
3. 0.6
4. 1.4

9. What is the median of 2, 4, 6, 8?

1. 4
2. 5
3. 6
4. 7

10. A coin is flipped. What is the probability of getting tails?

1. 0
2. 1
3. 1/2
4. 1/4

11. What is the range of 5, 5, 5, 5?

1. 0
2. 1
3. 20
4. 5

12. The ages of 5 children are 8, 9, 7, 10, 6. What is the mean age?

1. 10
2. 7
3. 8
4. 9

13. Which measure is most affected by outliers (extreme values)?

1. Mean
2. Median
3. Mode
4. Range

14. What is the probability of rolling an even number on a fair dice?

1. 1/2
2. 1/3
3. 1/6
4. 2/3

15. A dataset is: 5, 5, 5. What is true?

1. All three are different
2. Mean = Median = Mode
3. Mean only equals Mode
4. Mode doesn't exist

16. What is the mode of 1, 2, 3, 4, 5?

1. 1
2. 3
3. 5
4. No mode

17. There are 5 red, 3 blue, and 2 green sweets. What is P(green)?

1. 1/10
2. 1/5
3. 2/10
4. 3/10

18. What does a probability of 0 mean?

1. Certain
2. Impossible
3. Unlikely
4. Very unlikely

19. The test scores of 6 students: 70, 85, 90, 60, 75, 80. What is the mean?

1. 75
2. 76.67
3. 80
4. 82.5

20. What is the median of 11, 14, 17, 20, 23, 26?

1. 17
2. 18
3. 18.5
4. 20