# Questions tagged [sampling]

Creating samples from a well-specified population using a probabilistic method and/or producing random numbers from a specified distribution. As this tag is ambiguous, please consider [survey-sampling] for the former and [monte-carlo] or [simulation] for the latter. For questions regarding creating random samples from known distributions, please consider using the [random-generation] tag.

2,485 questions
Filter by
Sorted by
Tagged with
11 views

### CLUSTER SAMPLING PROOF

i have one questions that referred to book "On Efficiency of Cluster Sampling" (Daroga Singh, 1956) and my problem is i don't have that book, 9.14 The following sampling schemes for estimating the ...
12 views

### Limit of multivariate hypergeometric distribution for infinite colours/categories?

The multivariate hypergeometric distribution gives the probability of drawing, without replacement and in any order, $n_1$ balls with colour (or of category) #1, $n_2$ balls with colour #2, ... $n_c$ ...
41 views

### Understanding hypothesis testing using bootstrapping and simulating the null hypothesis method

I am trying to understand the bootstrap technique to perform hypothesis testing using the following post (This is also a part of Udacity Datascientist Nanodegree course): https://towardsdatascience....
34 views

### Hypothesis test for arbitrary distribution

Given a sample of $N$ observed values I'd like to test the null hypothesis that they arose from an arbitrary PDF (for which I have the analytical form). There are tests in place that can handle some ...
7 views

### Match sample to equal men and women in factor analysis?

I have a sample of 1567 autistic participants (m = 925, f = 642) who all completed a 75 question questionnaire measuring 'Systemising' or the drive to understand systems/patterns. For my ...
14 views

### Diversity enhancing sampling from positively dependent random measures

Is there any efficient method to maximize diversity of samples when sampling from a set of positively dependent random variables?
15 views

### Inclusion probabilities in two stage cluster sampling

So, there are H total clusters, each with size N_h. Two-stage cluster sampling involves: 1. Randomly selecting n_1 <= H clusters (without replacement) 2. Randomly selecting (w/o replacement) n_2 ...
18 views

### Sampling a distribution in 3 sections

For a time series process simulation I defined an input. It's a pulse train, the height of every pulse is one of three 3 possibilities (1, 2 or 3). That input is then convoluted with a process ...
15 views

### Two stage sampling method for my research in high schools

My research will be in high schools. Sample size will be over 300 and I have to choose them among 13 schools. Total number of students is over 3000 and when I think about sampling method, two stage ...
59 views

20 views

### Probability of filling M boxes with 2 or more elements when sampling S elements from N total elements

Similar to this question, Frequency of Item in Combination. I am randomly sampling S objects out of N=99 objects into 9 boxes labeled by a single character, "A-I". Question 1: I want to find the ...
12 views

### Choosing a representative sample for Clustering

I am doing Cluster Analysis for clickstream data. My data set has got 18 columns and over 821.000 rows. It has only numeric data. The rows represent customers, the columns Shopping baskets, number of ...
51 views

### Gibbs sampling for Multivariate: how to update?

In this page of Murphy's 'Machine Learning: a Probabilistic Perspective' it's explained how to do Gibbs sampling on a Gaussian Mixture Model. Reading this, I was trying to understand when to update ...
15 views

### Inferential statistics for multiple classes / groups

I have data regarding calls to a company. Only a small proportion of calls are classified into about a hundred different categories by a group of humans. The volume of calls is in the range of ...
12 views

### Combination of different Markov chains

Suppose I have a state space X with probability $\pi(X)$ that I want to sample via Metropolis Monte-Carlo. Suppose I have $T_1(x \rightarrow x'),...,T_n(x \rightarrow x')$ different transition ...
30 views

### How to sample a set of numbers, given the discrete probability distribution for the nth largest number

I recently saw a problem stated like this.. Generate a random set of 3 numbers, each distinct, such that The smallest number has the following pdf: {1: 25%, 2: 30%, 3: 15%, 4: 30%} The 2nd ...
3 views

### Statistically analyze path planning strategy effectiveness based on motion samples

My research concerns robot path planning. I want to demonstrate that a robot is more successful using one path planning strategy over another. In these scenarios, two robots are competing, and a ...
145 views