DA0-001 · Question #168
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…
The correct answer is C. There is a difference in a dancer's flexibility between static and dynamic stretching. For a two-tailed, independent t-test examining the influence of stretching on flexibility, the alternative hypothesis states that there is a difference between the groups.
Question
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?
Options
- AA dancer's flexibility is improved through static stretching.
- BThe change in a dancer's flexibility is not equal to zero.
- CThere is a difference in a dancer's flexibility between static and dynamic stretching.
- DThe means of the static and dynamic stretching groups do not differ from each other.
How the community answered
(34 responses)- A3% (1)
- B3% (1)
- C85% (29)
- D9% (3)
Why each option
For a two-tailed, independent t-test examining the influence of stretching on flexibility, the alternative hypothesis states that there is a difference between the groups.
This statement represents a one-tailed alternative hypothesis, as it predicts a specific direction of improvement, which is not suitable for a two-tailed test.
The alternative hypothesis (H1 or Ha) for a two-tailed test asserts that there is a statistically significant difference between the population parameters being compared, in this case, a difference in flexibility between dancers using static versus dynamic stretching, without specifying the direction of the difference.
Concept tested: Hypothesis testing - alternative hypothesis
Topics
Community Discussion
No community discussion yet for this question.