# Questions tagged [subset]

1 set, A, is a subset of another, B, iff all elements of A are elements of B.

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### 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 ...
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### 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 ...
946 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 ...
27 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.
19 views

### 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 ...
39 views

### 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 ...
23 views

146 views

### Find a subset of input data space with high classification accuracy?

I'm having what would seem to be quite a general and widely applicable problem but I can't find literature on the subject. Example problem: Imagine I have medical records of thousands of patients (...