## SE of ∆ [General Statistics]

Dear Helmut,

» » BTW: the formula (2) is

»

» How would you call it?

See the subject of your post.

The error term in the 2×2×2 crossover is MSE (aka mean squared error). Or the square root of MSE.

» We use \((3)\) in

» If we agree that \(\small{\widehat{\sigma}_\textrm{w}=\sqrt{MSE}}\) * we end up with \((2)\)

Correct.

» » BTW: the formula (2) is

**not**the error term in the 2×2×2 crossover.»

» How would you call it?

See the subject of your post.

The error term in the 2×2×2 crossover is MSE (aka mean squared error). Or the square root of MSE.

» We use \((3)\) in

`PowerTOST`

’s `BE_CI.R`

line 30:`sqrt(mse*ades$bkni*nc)`

`design = "2x2"`

`ades$bkni`

is `0.5`

and `nc`

is `sum(1/n[1]+1/n[2])`

.» If we agree that \(\small{\widehat{\sigma}_\textrm{w}=\sqrt{MSE}}\) * we end up with \((2)\)

Correct.

—

Regards,

Detlew

Regards,

Detlew

### Complete thread:

- Adjusted indirect comparisons: Algebra Helmut 2020-10-01 16:41 [General Statistics]
- Adjusted indirect comparisons: Algebra d_labes 2020-10-01 17:03
- Adjusted indirect comparisons: Typo Helmut 2020-10-01 17:13

- SE of ∆? Helmut 2020-10-02 14:56
- SE of ∆? or what? d_labes 2020-10-02 18:54
- SE of ∆ Helmut 2020-10-02 22:29
- SE of ∆d_labes 2020-10-04 10:23

- SE of ∆ Helmut 2020-10-02 22:29

- SE of ∆? or what? d_labes 2020-10-02 18:54

- Adjusted indirect comparisons: Algebra d_labes 2020-10-01 17:03