Cross Validated Questions, Problems & Solutions : TransWikia.com ~ Page 66

Assessing the representativeness of population sampling

I am looking for some suggestions about assessing the representativeness of a particular dataset I am analyzing. In this dataset I am looking at the relationship between two variables...

Asked on 01/12/2021 by user3136

1 answer

Question about an exponential Bernoulli distribution

Mohie El-Din and Amein (2011) define a distribution in formula (1.2)which they call the exponential Bernoulli distribution (EBD).The distribution has the following form:$$displaystyle f left(t right)...

Asked on 01/11/2021 by Ad van der Ven

1 answer

How can an A/B test show significant result without enough data

I am running an A/B test and to check if I have enough data I use this calculator which tells me that it does not have...

Asked on 01/11/2021 by Jonas Palačionis

0 answer

Cross-lagged model and supplement regressions: Do I have to include my control variables in the supplement regression analyses?

I’m conducting a cross-lagged panel model with 3 measurement waves. I include my two main variables (act, ese) and control variables (cv1, cv2, cv3). I also run supplement regression analyses...

Asked on 01/11/2021 by Sventon

0 answer

Is it Valid to Grid Search Cross Validation for Model Hyperparameter Selection then a separate Cross Validation for Generalisation Error?

The question has to do with Model Selection and Evaluation I'm trying to wrap my head around the scale of how different nested cross validation would be from the following:...

Asked on 01/11/2021 by Benjamin Phua

2 answer

Find $E[N^2 | N > 2]$ for a frequency distribution

N has probability mass function: $p_o = p_1 =0$ and $p_k = frac{1}{(e^1-2)k!}$ for $k=2,3,4,...$ I Solved for the pgf of N and got $G(t) =...

Asked on 01/10/2021 by confusedmathstudent

1 answer

Finding meaningful boundaries between two continuous variables in R

To find the relationship between two columns of the iris dataset, I am performing kruskal.test and p.value shows a meaningful relationship between these two columns.data(iris)kruskal.test(iris$Petal.Length, iris$Sepal.Width)Here are the results:...

Asked on 01/10/2021

0 answer

Using categorical feature as both a continuous feature, and also doing One hot encoding. Is this overkill?

I am working on a Machine Learning regression problem, with a data-set where I have data from a period of several years. From the "date" feature, I extracted the week...

Asked on 01/10/2021 by stats_nerd

2 answer

Formal book about GLM

I'm searching for a book who treat GLM in a formal way, with a measure theoretic approach. Someone could help me?i try to be more specific Suppose $...

Asked on 01/10/2021 by anto_zoolander

0 answer

Expected value of the residuals

How would one prove that the expected value of the residuals from OLS regression is zero? I will make two cases. In the first case I treat $X_i$ as...

Asked on 01/10/2021 by Snoopy

2 answer

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