Questions tagged [survey-sampling]

Creating samples from a well-specified population (human: all adults; registered voters; individuals with diabetes; students of a university; establishment: all firms; firms with employment of 200 or more in New York City; resource: all land of a country or a state/province) using a probabilistic method, with the purpose of inference to that specific population

Filter by
Sorted by
Tagged with
0 votes
1 answer
23 views

Analyzing data from a non-randomized sampling design (ecological monitoring)

I have 2 questions about analyzing data that was not randomly sampled from a population. I work with "ecological monitoring" data that involves repeatedly taking measurements from the same ...
  • 775
0 votes
0 answers
12 views

How do you calculate the total sample size in stratified sampling?

I know that we can allocate observations from the total sample to each strata either using proportional allocation ($n_{h}/N_{h} = n/N$) or optimal allocation: $$n_{h} = \left [ \frac{\frac{N_{h}S_{h}}...
5 votes
3 answers
132 views

How to check the data is generated by machine or human?

I have a bunch of data points (about 300 samples in total), each sample is a number from 1 to 3 (from {1, 2, 3}). These numbers are supposed to come from a survey. Are there any statistical methods to ...
  • 215
2 votes
0 answers
23 views

Alternatives to Fuller’s (2009) Sampling Statistics

I’m taking a self-study course in sampling statistics this semester and my professor chose Fuller’s (2009) Sampling Statistics for both the content and the homework questions. However, I am really ...
  • 31
1 vote
1 answer
32 views

Sample size calculation for a difference between two groups with clustered data

I want to compare proportions or means in two groups in a clustered sample. Suppose the sampled clusters are schools or hospitals or Census areas, and we sample from each of these an equal number in ...
  • 246
1 vote
0 answers
37 views

multiple questions about setting up survey weights with the application of a combination of different types of weights - ESS

Checking out this file published by the european social survey website https://www.europeansocialsurvey.org/docs/methodology/ESS_weighting_data_1.pdf it states that : • when analysing data for one ...
  • 53
0 votes
1 answer
40 views

Confusion regarding proof that the variance estimator is unbiased for finite population

Going through Sharon L. Lohr's Sampling design book (2nd Edition), I have no issues with the content all the way until it goes into the proof in chapter 2 on SRSWOR that $E[s^2] = S^2$, where $S^2$ is ...
1 vote
1 answer
34 views

Age and sex standardised incidence rates

If I were to compute age-sex standardised incidence rates based on a simple random sample of a nationwide household survey on hearing loss. Noting that this a sample not the total population, so the ...
  • 13
2 votes
2 answers
146 views

Minimum sample size calculations for two-sample two-tailed proportion z test

I'm struggling to reconcile some minimum sample size calculations. I'm seeking a minimum sample size for two-sample two-tailed proportion z test. I set my parameters as follow... alpha = 0.05 power = ...
  • 123
0 votes
0 answers
22 views

Is the use of approximate MSEs of seperate and combined ratio estimators apt for small sample sizes?

The problem below is from Cochran's Sampling Techniques, chapter 6, titled Ratio Estimators: The following data are for a small artificial population with $N= 8$ and two strata of equal size. $ \...
1 vote
0 answers
24 views

What sampling approach should I use to characterise groups of different sizes?

Suppose I have a large (~10M) group of games, played by a large (~100K) group of players. Games are 1v1 and scored, so each player has a rating (analogous to chess in these regards; the real dataset ...
0 votes
2 answers
52 views

How to validate representativeness of survey on new social group?

Say a new social group X emerges in society. Say you take a sample from individuals in this group X. How to validate the sample's representativeness? For samples of other parts of society, you have a ...
  • 2,549
0 votes
0 answers
16 views

How to update survey weights after fixing strata membership/assignments?

Imagine we conduct a survey using stratified sampling, and after the survey closes, we find out that we had misclassified some of the respondents. They actually belong to different strata than we had ...
2 votes
1 answer
99 views

Unbiased estimator of population variance for sampling without replacement

What I wrote below only apply to the situation where we have finite population. I saw many of my friends used sample variance with Bessel's correction $\frac{\sum_i^n (X_i - \bar{X})^2}{n-1}$ to ...
  • 259
1 vote
1 answer
58 views

How to resample members from the population who didn't respond after the survey?

I have used stratified random sampling on population to generate the sample. Now the issue is if after the survey is conducted some of the members in the sample ...
  • 73
0 votes
0 answers
16 views

Sampling population to replicate another population

Disclaimer: This question is quite general and I assume there are multiple answers equally valid, and at this point I have no a priori opinion on what is "similar" population so everything ...
  • 291
1 vote
0 answers
131 views

How to check if the sample represents the population data?

The below table is similar to the population ...
  • 73
0 votes
0 answers
35 views

Is this weighted sample mean unbiased for the weighted mean?

For a sample $s$ from a population $U$ chosen under a sampling design $p(s)$ inducing weights $w_k=\frac{1}{\pi_k}$ where $\pi_k$ is the probability of inclusion. Define the sample weighted mean like $...
0 votes
0 answers
27 views

Repeated Systematic Survey Design with double sampling using Survey package

I am new to the Survey Package in R and am unsure on how to correctly code the design. I have a repeated systematic design. Transects are placed systematically and there are 3 random starts (for 3 ...
  • 1
0 votes
0 answers
15 views

Why do sampling designs with variable sample size suffer from greater variance of the HT estimator?

I am following the reference Model Assisted Survey Sampling by Särndal. In chapter 3 we are introduced to the Bernoulli sampling and calculate the Horvitz-Thompson for the population total $Y_U$ of ...
0 votes
0 answers
15 views

Comparing survey multiple choice survey questions response percentages between a subset's responses and the total collected responses

I have a survey composed of multiple choice questions. Several distinct branches of the same organization responded to the survey. I want to see if the distribution of answers from one branch is ...
0 votes
0 answers
16 views

Determining correct survey degrees of freedom for replicate variance estimators

Question: Recently the survey package in R adopted a clever new way to estimate the degrees of freedom for replication variance estimators: calculate the rank of ...
  • 247
3 votes
1 answer
52 views

How many sets of variables do I need to assess all pairwise correlations in a planned missing design

I have 54 variables that I need to correlate, but due to constraints I can only put up a maximum of 16 variables at a time for data collection. At the end of the day, I need estimates of the 1,431 ...
0 votes
1 answer
31 views

Survey response frequency doesn't match the population distribution

Let's say I ask 1,000 people a survey with 10 questions. Of these 1,000 people, 50% were men and 50% were women The number of responses, however, were as follows: Men: 100 (66.6% of responses) Women: ...
  • 111
0 votes
1 answer
24 views

Questions on Data Quality Assessment

I have been bumping my head against wall in trying to figure out a good real-world solution for this challenging problem that my friend asked me. Could you please give some pointers? Lets say we want ...
0 votes
0 answers
26 views

How many variables for a recommender system?

I'm creating a survey for 60 people. I'd like to measure their music, tv-series and purchasing tastes. The survey will show a number of songs. People will be asked to say if they like it (1) or not (0)...
2 votes
1 answer
403 views

Is a "trimmed" simple random sample still a simple random sample?

Suppose I have a population of size N (N is large, say a million), and I take a simple random sample of size 100. Denote the units in the sample as $u_1$, ... $u_{...
0 votes
1 answer
103 views

How do you sample without a sampling frame?

I want to research the returns to education in my city as well as assess whether people who have studied abroad on average earn more than those who have studied within the country. The data required ...
0 votes
1 answer
32 views

Estimating Population mean given a sample, and the population size

For my study, I have population size known (in order of millions), and a sample data (about 30 sample size). I can estimate population mean using 95% confidence interval by t distribution or normal ...
's user avatar
0 votes
0 answers
20 views

How to weigh data points to match multiple dimensions?

I am trying to match the results of one survey to another. I would like sex and age to match, so first, I weigh each datapoint to match the distribution of male/female. However, when trying to weigh ...
0 votes
0 answers
12 views

Detecting Hosting companies

I am conducting research where I have a list of "ranges" which may or may not host websites. If a range has many websites there is good chance that the overall company may be a hosting ...
0 votes
0 answers
26 views

What is the effective sample size in conjoint experiments?

I am running a conjoint forced-choice survey experiment. The idea is to interview 500 respondents, that will perform 5 choice tasks choosing between 2 profiles. Profiles are fully randomized. My ...
  • 121
0 votes
0 answers
131 views

How to calculated weighted proportion for a binary variable

I have a dataset with 100 samples of a PPS survey, and the outcome (y) is a binary variable (Y/N). I've calculated the weights for each sample, and I'm wondering how to calculate (formula) the ...
1 vote
0 answers
11 views

Nonresponse weight adjustments in multi-stage household surveys

I have a question about nonresponse weighting in complex sample surveys in multi-stage designs, like say, The US National Comorbidity Survey Replication (NCS-R), the Health and Retirement Study (HRS), ...
1 vote
0 answers
22 views

Estimating the size of a population. Is the method employed valid?

Context: in North America there has been a Drug Overdose Epidemic for several years. In my own municipality, more people have died of overdose than of COVID during the pandemic. My workplace (a non ...
0 votes
0 answers
18 views

Base weights/Relative weights when sampling strata change

I have survey responses from a survey where the sampling plan was stratification with sampling rates proportional to the square root of the number of households. The plan created 12 strata, and the ...
0 votes
0 answers
179 views

Using chi square test to determine representativeness of sample drawn from known population

I am trying something out of my comfort zone and would appreciate any help provided! I have used census data to identify the frequency of age brackets in my town. I then sampled about a thousand ...
3 votes
1 answer
122 views

How is the asymptotic justification of the "linearization by influence function method" for surveys established?

The survey R package recently adopted the "linearization by influence function" method of estimating covariances between domain estimates. The central ...
  • 247
1 vote
0 answers
35 views

Comparison between weighted and unweighted surveys

I was hoping to get your take on comparing the results of a weighted survey with an unweighted survey. I have the results of two different surveys conducted in my state. Survey A was a multi-stage, ...
  • 584
0 votes
1 answer
64 views

Sample Size determination at coutry level or states levels

A country is stratified into states. A researchers wants to carry out a survey with a main requirement of state level data representation. I wonder if sample size should be determine using country ...
  • 2,439
2 votes
0 answers
36 views

Using a sample of paid survey respondents to bias correct lower response rate among larger non-paid sample

I'm running a tracker survey on a website that has a low response rate of about 2%. The survey is not incentivized but the website traffic is large enough in volume I can always meet my sample target ...
  • 121
0 votes
0 answers
18 views

Book on probability proportional to size sampling

Can anyone please suggest a book to study probability proportional to size sampling with and without replacement and all its details ? Thank you
3 votes
1 answer
78 views

How to show that $\pi^*_i \pi^*_j - \pi^*_{ij} = \pi_i \pi_j - \pi_{ij}$ in a probability sample?

Let $\pi^*_i \quad i=1,2,\dotsc, N$ be the probability of not including the $i$th unit in the sample and let $\pi^*_{ij} \quad i, j = 1, 2,\dotsc, N$ be the probability of including neither the $i$...
  • 417
1 vote
1 answer
71 views

Survey sampling: How many participants per group (current, former, and potential users) should we recruit?

We are designing research in which we will explore the perception of users (C current, F former, and P potential) on a product. We apply the same questionnaire for each group adapting (verb tenses) ...
0 votes
1 answer
63 views

Calculation of survey weights when some respondents are certain to be selected

I am helping with the design of a household survey which will use a four-stage sampling process, and I am unsure how to account for some elements of the population being selected with 100% probability....
  • 1
1 vote
1 answer
25 views

Do survey sample standard errors take into account/correct for anything else besides finite population?

Regular standard errors are biased when the data comes from a survey sampling design. The article "Wait Wait, Don't Tell Me... You're Using the Wrong Proc!" explains that the bias is due to ...
  • 2,026
0 votes
1 answer
30 views

Sample size of a vote transfer poll

A vote transfer poll asks the electorate about how they voted in the last election and how they would vote if the next election was now. With the result from both questions one could build a matrix of ...
1 vote
1 answer
416 views

Specifying the survey design correctly in the R survey package

I have the results from a survey where a geographic area was stratified and power allocation (using the number of households in each stratum) was used to determine the number of surveys to send out to ...
0 votes
0 answers
13 views

Need help on running sample data analysis -

Background: I have a survey data for a year 2019 where I received 50% response rate. I wanted to compare it with 2020 data which has 65% response rate. Question being asked in the survey is to rate ...
2 votes
1 answer
113 views

Sample size for two-staged cluster sampling

I have a question about the R-package samplesize4surveys. I want to calculate sample size for tests of difference in proportions in a two-step clustered sampling ...
  • 1,148

1
2 3 4 5