Câu 84: DA0-001: Data+

A data analyst is using a two-tailed, independent t-test to determine whether the type of stretching, dynamic or static, has any influence on a dancer’s flexibility. Which of the following is the alternative hypothesis?

1. A. A dancer’s flexibility is improved through static stretching.
2. B. The change in a dancer’s flexibility is not equal to zero.
3. C. There is a difference in a dancer’s flexibility between static and dynamic stretching. — đáp án hiện tại
4. D. The means of the static and dynamic stretching groups do not differ from each other.