Manual Event (Session ID,DateTime,Event) = 95jlsg1u4t39lqe6dg9ji1gpkl 20220125040728 /web-based-audio-visual-learning-materials/programme-evaluation-and-impact-assessment-3/presurvey/

1

Which is a correct statement about power?

A

Power means the probability of correctly rejecting a null hypothesis when a real difference or association definitely exists.
B

Power means the probability of correctly accepting a null hypothesis when a real difference or association definitely exists.
C

Power means the probability of wrongly rejecting a null hypothesis when a real difference or association definitely exists.
D

Power means the probability of correctly rejecting a hypothesis when a real difference or association definitely exists.
2

Which of the following statements is correct about the effects of power on the results of a study?

A

Studies with high power are less likely to produce significant results, even though a clinically meaningful effect exists.
B

Studies with low power are less likely to produce significant results, even though a clinically meaningful effect exists.
C

Lack of statistical significance means that there is no treatment effect as an outcome of low power.
D

Lack of statistical significance means that there is no treatment effect as an outcome of high power.
3

How much power is sufficient to produce significant results?

A

Adequate power for a study is generally accepted as being 0.2.
B

Adequate power for a study is generally accepted as being 0.8.
C

Adequate power for a study is generally accepted as being 0.3.
D

Adequate power for a study is generally accepted as being 0.1 .
4

Which of the following can be computed using a priori power analysis?

A

Alpha
B

Sample Size
C

Power
D

Effect size
5

Which of the following can be computed using post hoc power analysis?

A

Power
B

Alpha
C

Sample Size
D

Effect size