Statistics – Variance & Standard Deviation

Grade 11 Maths — Statistics – Variance & Standard Deviation: 25 practice questions with instant scoring and explanations.

1. Variance is defined as:
2. The formula for variance is:
3. Standard deviation is:
4. The formula for standard deviation is:
5. For dataset 1, 2, 3, 4, 5, the variance is:
6. For dataset 1, 2, 3, 4, 5, the standard deviation is:
7. If all observations are identical, the standard deviation is:
8. Variance is always:
9. The relationship between variance and standard deviation is:
10. For data with mean 50 and variance 25, standard deviation is:
11. The coefficient of variation is:
12. If variance of data is 4, then standard deviation is:
13. An alternative formula for variance is:
14. For the dataset 3, 6, 9, 12, 15, the mean is:
15. Variance of 3, 6, 9, 12, 15 is:
16. Standard deviation of 3, 6, 9, 12, 15 is:
17. If each observation is increased by constant c, the variance:
18. If each observation is multiplied by constant k, the variance becomes:
19. The standard deviation of 2, 4, 6, 8, 10 is:
20. Variance can never be:
21. For a dataset, if mean = 20 and SD = 4, CV is:
22. Sample variance uses denominator:
23. Variance is expressed in units of:
24. Standard deviation is expressed in units of:
25. For data 5, 10, 15, variance is: