# All Questions

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### How Random Forest handle missing value in sk-learn? [duplicate]

What is the technic used in Random Forest Regressor from scikit-learn to handle missing value ? First I thought that a Random Forest regressor was able to natively handle missing value during training ...
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### Polynomial contrasts statment in SAS [closed]

I want to make a polynomial (linear, quadratic and cubic) contrast statement in SAS. I have four levels of treatment, and they are unequal. How can I make the contrast statement? Kindly guide
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### What is the best test to run to compare presence/absence of something between sampling locations?

I have data on the presence/absence of four different pathogens found in edible crabs in 7 locations over 2 seasons. For this study, 30 crabs were collected from each site and for each crab the ...
10 views

### How to disentangle effects of components in system?

I have a system where one property (delay) depends on its components, a valve $V$ and the piping $P$ in a hydraulic system: $d = f(V, P)$ I have reference measurements with one type of valve and ...
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38 views

### Are all random variables estimators? [duplicate]

My hand-wavey understanding is a random variable is a function from a domain of possible outcomes in a sample space to a measurable space valued in real numbers. We might denote a random variable from ...
24 views

### Optimal Timing for Structural Break Analysis in Price Transmission Modeling

I am investigating the price transmission between two inflation indices within the same sector but at different stages of processing. For example, I might be looking at the relationship between raw ...
9 views

### Checking if the relationship between a composite score and its components across variates covariates

I have created a continuous composite score, C, which consists of scores A + B. I have a predictor variable, D. This would produce 3 different regression formulas, where predictor D has a coefficient ...