behavior science - guriyah

[ArchivalUser]

study design is selection bias. Young and relatively healthy group is not suitable placebo control for old and severe group for real drug.

Reanalysis of data can not overcome the bias. so D is not correct.

This Q is a typical beta error.

[ArchivalUser]

hey sAGE
its not a b eror
its an alpha error

[ArchivalUser]

Null hypothesis: there is no difference between test and control groups.

type I (alpha) error: reject null hypothesis, but actually null hypothesis is right.

Type II (beta )error: can not reject null thothesis, but actually null hypothesis is incorrect.

[ArchivalUser]

Yup - classic beta error - failure to reject null hypothesis ( Null hypothesis states that no difference between drug and placebo)

[ArchivalUser]

sage n sunshine
Thanks a lot