# Questions tagged [subset]

One set, A, is a subset of another, B, if and only if all elements of A are elements of B.

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### SPSS - Analyzing output of bootstrapped samples using Python

I use Python to generate 1000 bootstrapped samples of 4 observations from a dataset of 122 observations and calculate the mean of several variables (C, S, and A) each time. My exact syntax is: ...
8 views

### Multi-categorical set balancing

I have a particular mathematical problem that I would name as multi-categorical set balancing. I don't think this is a new problem but I do not know the correct term for it, therefore I am also ...
53 views

### What is it called when we “zoom in” a data distribution?

Suppose we have a 2D distribution of shops in an area. For example, here is a heatmap density plot of (latitude, longitude) location of shops in a province: Now suppose that we "zoom into" the ...
22 views

### Is it appropriate to include overlapping sub-scale scores and total-scale scores in a meta-analysis?

Question, brief In a single multi-level meta-analysis, is it appropriate to include subscale scores (which represent part of a measure) in addition to total scale scores (representing the full ...
19 views

### Subset selection with reinforcement learning

I have a set of $N$ items of which a subset of arbitrary size can be chosen. I want a reinforcement learning (RL) agent to perform the subset selection and am unsure how to best design the action ...
22 views

### Q: AUC of each subgroup is smaller than overall AUC

I have a validation data set of 29242 patients, with known labels/health outcomes and predictions that were generated by some model. 28626 patients are negative and 616 are positive The overall AUC is ...
30 views

### How to test that a subset of data is distributed no differently than original (discrete, not normal)

In the research I am doing we have initially had ~600 samples which had a certain distribution (not normal, although close). The characteristic of these samples that I am interested in is discrete (...
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### How can I redistribute the probability of a partially matching name based on frequency of unmatched word tokens?

I am a computer scientist, not a statistician, so I apologise in advance if I am unaware of common knowledge in this area or if I have explained something poorly. Please feel free to ask for ...
33 views

### Compact encoding (vectorization) of unbounded sets

Question I have a set of sets. Each set is unbounded. I would like to find a methodology to encode (vectorize) each subset. I am more specifically interested in memory efficient solutions. ...
15 views

### Combining PCAs group of variables

So I want to Research the importance of 6 Group of variables on my dependant variable. I have ~50 variables in 6 Groups (which i Need to keep for my hypothesis). I did a PCA on each Group of Variables ...
213 views

### Determine how similar groups of data are to each other

I have a pool of 15,000 unique* items. From that set, there are roughly 3200 sets of 60 items, selected non-randomly (in fact, for the sake of the framing of the question, let's say that each item is ...
11 views

### Inferential considerations when comparing a group against the total

I want to compare the value of a subgroup against the same value in the total population in a regression setting. The easiest way to do it would be to treat the subgroup and the total dataset as two ...
1k views

### How to calculate number of sets in Sigma Algebra

The example 1.2.2 of the book Statistical Inference by Casella and Berger states: if S has n elements, there are 2^n sets...(please see attached). Could you please explain how the authors derived ...
40 views

### relation between conditional probability of subset and set

Suppose $A\subseteq B$. Can we derive a relationship between P(X|A) and P(X|B) for some X? X is associated with A.
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### Data sub-set question

I have a data set of 15,000 with the following characteristics: median : 3.3 avg : 4.3 st dev : 3.5 kurtosis : 19.05 skew : 3.94 Now from within that I have a smaller sub-set. There are 1,160 in ...
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### Why do subset selection linear models have higher variance than the full model?

I do not get the meaning of this sentences from the Elements of Statistical Learning book when talking about subset selection methods before introducing shrinkage methods. By retaining a subset of ...