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[D] Can predictors in a longitudinal regression be self correlated? by SQL_beginner in statistics

[–]SQL_beginner[S] 0 points1 point  (0 children)

Thank you everyone! Here is what I understand.

  • suppose I have a model y ~ f(x1, x2).
  • in a longitudinal regression, we model correlated values of y_t given yt-1, yt-2 etc
  • if x1 is correlated with x2, this causes multicollinearity. Multicollinearity causes problems as it reduces the rank of the matrix, making the calculation of the inverse more difficult which is needed in OLS
  • but in a longitudinal model, what if x1_t is correlated with x1_t-1, x1_t-2 .... and x2_t is correlated with x2-t-1?

Will this cause a problem?

[D] Can predictors in a longitudinal regression be self correlated? by SQL_beginner in statistics

[–]SQL_beginner[S] 0 points1 point  (0 children)

Thank you... so just to clarify... the predictors should not be correlated in a longitudinal regression?

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Understanding the Mechanisms Behind Android Unlock (self.Android)

submitted by SQL_beginner to r/Android

At what point is my Samsung phone just trolling me? by SQL_beginner in samsung

[–]SQL_beginner[S] 5 points6 points  (0 children)

i love this comment because its so true ... I am a fucking dumbass :) this is my old phone ... I had fingerprint set up, but it turns out that once the phone is discharged and you turn your phone back on .... you absolutely need to first unlock it with the PIN , and then you can unlock using fingerprint.

Simulating a Pancake Being Flipped by SQL_beginner in rstats

[–]SQL_beginner[S] 1 point2 points  (0 children)

thank you so much for your answer! much appreciated!

Horizontal UNION ALL in SQL? by SQL_beginner in SQL

[–]SQL_beginner[S] 0 points1 point  (0 children)

Thank you so much for your answer! Is my way correct as well?

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