Grade 8 Statistics & probability worksheet

What is on the worksheet

1. Find the range of: 66, 53, 111, 83, 90, 131.

2. A bag contains 23 red counters and 34 blue counters. One counter is drawn at random. What is the probability of red?

3. Find the mean of 25, 40, 40, 44.

4. A bag contains 6 red counters and 32 blue counters. One counter is drawn at random. What is the probability of red?

5. Find the range of: 18, 25, 113, 51, 133, 123.

6. Find the mean of 20, 5, 34, 48.

7. Find the mean of 14, 37, 29, 48.

8. Find the mean of 47, 17, 40, 19.

9. A bag has 4 red and 7 blue counters. Draw twice, replacing the first counter. What is the probability both are red? Give a simplified fraction.

10. Find the range of: 128, 106, 136, 44, 120, 113.

11. Data: 23, 33, 43, 53, 63, 73, 83, 93. Using medians of the lower four and upper four values, find the interquartile range.

12. Data: 39, 49, 59, 69, 79, 89, 99, 109. Using medians of the lower four and upper four values, find the interquartile range.

13. A bag contains 30 red counters and 28 blue counters. One counter is drawn at random. What is the probability of red?

14. Data: 41, 45, 49, 53, 57, 61, 65, 69. Using medians of the lower four and upper four values, find the interquartile range.

15. Find the range of: 7, 15, 89, 92, 21, 30.

16. Find the range of: 97, 20, 113, 70, 53, 27.

17. Find the median of 88, 21, 70, 35, 57.

18. Find the range of: 127, 73, 79, 7, 13, 137.

19. Find the median of 60, 84, 76, 59, 75.

20. P(A) = 11/35. Find P(not A).