Biostat Q, please help! - cinnamoncrunch

[ArchivalUser]

Can someone please explain this for me? I'm totally confused with the q and the answer.

A large prospective study is designed to assess the association between postmenopausal hormone replacement therapy (HRT) and the risk of dementia, Alzheimer type. Small studies conducted earlier suggest a possible protective effect of HRT. What is the probability that the study will show an association if in fact HRT does affect he risk of dementia?

alpha
beta
w-a
1-B
type I error
Type II error

The answer is 1-B

[ArchivalUser]

it's the power of study.
finding TP.

[ArchivalUser]

its rejecting the null hypothesis when it is in fact false==> True positive?

basically detecting a difference when one exisits

am i right?

[ArchivalUser]

read the last line of q.
finding association when there is association ,means true positive.

[ArchivalUser]

thanks i get it mdkhayat!

[ArchivalUser]

Alternative Hypotheses H1 which is power 1-B
There is some association between the disease and the population at risk

[ArchivalUser]

yea i get it now! thanks guys