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Cross Validated : Recent Questions and Answers (Page 21)

Find answers to your questions about Cross Validated or help others by answering their Cross Validated questions.

Fixed effects versus random effects in panel data for intervention group only? Change in dependent variable for each time period

I have a panel dataset covering observations from the same individuals over six time periods (unbalance panel). I am interesting in estimating the change in a continuous dependent variable (i.e....

Asked on 12/11/2021 by Isobel M

0 answer

How to calculate ARIMA(1,0,0)(1,0,1)12 prediction by hand

I have converted the ARIMA (1,0,0)(1,0,1)12 into the following equation, $ (1-phi_1B) (1-zeta_1 B^{12}) Y_t = (1- eta_1 B^{12})e_t$ where $phi_1$ AR coefficient, $zeta_1$ is SAR coeffiecient,...

Asked on 12/10/2021 by CODE_DIY

1 answer

Compare RMSE for the same model but varying sample size

My empirical research is based on a variable $a_{i,t} sim f(mathrm{RMSE})$, i.e. it is based on the root mean squared error (RMSE) of a certain regression model $Y_{i,t}...

Asked on 12/08/2021 by skoestlmeier

3 answer

ANOVA determining percentage of variation

The Financial Review wished to estimate the amount of annual government spending using tax revenue and level of nationwide debt. Data from 1958-2008 (inclusive) was used. All variables were measured...

Asked on 12/08/2021 by Unistudent87

2 answer

Oscillating validation accuracy for a convolutional neural network?

My CNN training gives me weird validation accuracy result. When it comes to 2.5,3.5,4.5 epochs, the validation accuracy is higher (meaning only need to go over half of the batches...

Asked on 12/08/2021 by RockTheStar

3 answer

Beta values for mixed models

First of all, I am very new to statistics, so I apologize if this is a fairly obvious question. I am using R to run mixed models to include in...

Asked on 12/08/2021

1 answer

Comparing top level group effects using a 3-level hierarchical regression

I would like to detect group effects (if any) along with statistical confidences. I have a hierarchical data set structured as follows: Drug Groups--Patients-----Meter ReadingsThe Drug Groups consist...

Asked on 12/08/2021 by kev8484

1 answer

What are the worst (commonly adopted) ideas/principles in statistics?

In my statistical teaching, I encounter some stubborn ideas/principles relating to statistics that have become popularised, yet seem to me to be misleading, or in some cases utterly without merit....

Asked on 12/08/2021

32 answer

Statistical Analysis over different samples - Prediction for the number of objects

This may be a really simple question but here's my problem: I have different boxes with soil (wet sandy kind) and big stones in it. Each box is around 10kg...

Asked on 12/08/2021

0 answer

Group level distribution for positive parameters in Bayesian multilevel models

I am doing a lot of modeling with models that require some parameters to be positive by design. However, I am struggling to figure out which approach works best when...

Asked on 12/08/2021 by LiKao

0 answer

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