Cross Validated Questions, Problems & Solutions : TransWikia.com ~ Page 62

Variance of a stationary AR(2) model

I have two questions: 1) When one says an ARMA process is 'stationary,' do they mean strongly stationary or weakly stationary? 2) Is there a quick way to find the...

Asked on 01/26/2021 by user369210

2 answer

Avoiding adjustments for time-varying controls in difference-in-differences (DID)?

In difference-in-differences (DID) analysis, it seems like a "folk theorem" that one should be very wary of adjusting for time-varying controls. The reason, eminently plausible, is that time-varying controls...

Asked on 01/26/2021

0 answer

Removing the effect from structural breaks

I wanted to do a sanity check. I want to remove the effect of structural breaks on my series. Therefore, I create a dummy with 1s for the period of...

Asked on 01/25/2021 by Kiril E. Proykov

1 answer

Recommender System - Predict ratings with Random Forest Regressor or Classifier?

My dataset has clothes that contain features for every cloth. Let me show you the dataframe to understand. Every cloth...

Asked on 01/24/2021 by Oja Niva

0 answer

Nonparametric assessment of multiple predictors

What statistical analysis should I use when I have two or more continuous independent predictor variables and two or more dependent variables to be predicted? I cannot assume normal distribution....

Asked on 01/24/2021 by mephisto73

0 answer

Calculating measurement variance to achieve desired accuracy in estimation

The variables of interest are related by the following multivariate normal distribution:$$begin{bmatrix} x \ z_1 \ z_2end{bmatrix} sim mathcal{N}(begin{bmatrix} mu \ mu \ muend{bmatrix}, begin{bmatrix} sigma_{0}^2 & 0...

Asked on 01/23/2021 by Valjean

0 answer

Can large # of epochs or smaller batchsize compensate for smaller data size in training lstms

I have about 40 time series (40 products) of weekly sales for 3 years ( = 156 data points for each series). So, in total I have about 6240 data...

Asked on 01/23/2021 by tjt

1 answer

Probability that number of heads exceeds sum of die rolls

Let $X$ denote the sum of dots we see in $100$ die rolls, and let $Y$ denote the number of heads in $600$ coin flips. How...

Asked on 01/23/2021 by user239903

5 answer

Combining Sub-Samples for Factor Analysis?

I am a newbie on the site and a relative newbie to some of the analysis I am trying, so my apologies in advance for any rookie mistakes or for...

Asked on 01/22/2021

0 answer

Need to create a model to identify patterns in user details

I'm trying to create a model where I can detect fraudulent customers who try to access a certain app, using their personal details like fist name, last name, email and...

Asked on 01/21/2021 by pooza

0 answer

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