In a study of two groups, the following results were obtained:
|
|
Group A |
Group B |
|
Sample size |
20 |
25 |
|
Sample mean |
22 |
23 |
|
Sample standard deviation |
10 |
12 |
Which of the following statements is correct?
1
Group A is less variable than Group B because Group A's standard deviation is smaller.
2
Group A is less variable than Group B because Group A's sample size is smaller.
3
Group A is less variable than Group B because Group A's sample mean is smaller.
4
Group A is less variable than Group B because Group A's coefficient of variation is smaller.