Refers to an instrument used to collect a sample from a population. Surveying often refers to sampling of human populations and is primarily done by administering questionnaires or interviewing individuals. Sampling individuals for surveys in stratified populations may require more complex sampling than simple random to get more precise estimates of population parameters. Sampling design and analysis of survey data fall under 'Survey Methodology'.
Questions tagged [survey]
1074 questions
23
votes
2 answers
use of weights in svyglm vs glm
I would like to know how the treatment of weights differs between svyglm and glm
I am using the twang package in R to create propensity scores which are then used as weights, as follows (this code comes from the twang…
Joe King
- 3,024
- 6
- 32
- 58
19
votes
2 answers
How to calculate average length of adherence to vegetarianism when we only have survey data about current vegetarians?
A random population sample was surveyed. They were asked if they eat vegetarian diet. If they answered yes, they were also asked to specify how long they’ve been eating vegetarian diet without interruption. I want to use this data to calculate…
Saulius Šimčikas
- 303
- 1
- 10
14
votes
8 answers
How to treat illogical survey responses
I have submitted a survey to a sample of artists. One of the question was to indicate the percentage of income derived by: artistic activity, government support, private pension, activities not related with arts. About 65% of the individuals have…
Andrea
- 297
- 2
- 16
13
votes
8 answers
Surveys: Is 25% of a large user base representative?
My employer is currently running a company wide survey about attitudes towards the office i.e. Sentiment. In the past, they opened the survey to all areas of the business (Let's assume 10 very different departments) and all employees within them…
Colin
- 239
- 2
- 4
13
votes
5 answers
Why is it claimed that a sample is often more accurate than a census?
When learning the course of sampling, I meet the following two statements:
1) Sampling error leads to mostly variability, nonsampling errors lead to bias.
2) Because of nonsampling error, a sample is often more accurate than a CENSUS.
I do not know…
user785099
- 1,105
- 3
- 14
- 24
12
votes
2 answers
Identification of useless questions from a questionnaire
I'm developing a questionnaire. To improve its reliability and validity I want to use statistical methods.
I want to eliminate questions whose answers are always the same. This means that nearly all participants gave the same answers on those…
Max
- 121
- 4
12
votes
3 answers
Validating questionnaires
I am designing a questionnaire for my dissertation. I am in the process of validating the questionnaire I have applied a Cronbach's alpha test to the initial sample group. The responses to the questionnaire are on a Likert scale; can anyone…
john hall
12
votes
2 answers
How are margins of error related to confidence Intervals?
Can somebody tell me the difference between margins of error and confidence intervals? On the Internet I see these two meanings getting used interchangeably.
Is it right to say,
"Confidence intervals are shown as 1.96 and displayed on the graphs as…
Mintuz
- 223
- 1
- 2
- 6
12
votes
2 answers
Cross validation after LASSO in complex survey data
I am trying to do model selection on some candidate predictors using LASSO with a continuous outcome. The goal is to select the optimal model with the best prediction performance, which usually can be done by K-fold cross validation after obtaining…
aenima
- 343
- 1
- 2
- 8
11
votes
2 answers
What's the best way to visualize the effects of categories & their prevalence in logistic regression?
I need to present information about the main predictors of a candidate's votes using a public opinion survey data. I have run a logistic regression using all the variables that I care about, but I can't find a good way to present this information. …
user1172558
- 281
- 7
- 20
11
votes
1 answer
Does SurveyMonkey ignore the fact that you get a non-random sample?
SurveyMonkey has steps and a chart for you to figure out what sample size you need for a given margin of error or confidence interval, based on your population size.
SurveyMonkey sample size
Does this chart simply ignore the fact that you will not…
matt
- 213
- 1
- 5
11
votes
1 answer
How to interpret this PCA biplot coming from a survey of what areas people are interested in?
Background: I asked hundreds of participants in my survey how much they are interested in selected areas (by five point Likert scales with 1 indicating "not interested" and 5 indicating "interested").
Then I tried PCA. The picture below is a…
sitems
- 3,649
- 1
- 25
- 52
11
votes
6 answers
Is there a site to post my survey to so I can get a sample representative of the population?
This is only for my high school senior project, so it doesn't have to be perfect. I'm doing a project on global warming, and I want to survey people for their opinions. I know that if I use a convenience sample of my classmates, I'll have a lot of…
George
- 113
- 1
- 1
- 4
10
votes
2 answers
Can I combine several ordinal questions to create an index and/or composite measure?
I am using a survey that contains several questions about various dimensions of performance for policy research institutes. Here, performance in the policy arena is unpacked into things like:
quality of research,
overall ability to engage with…
Philippe
- 101
- 1
- 1
- 4
10
votes
5 answers
What is calibration?
What does it mean to calibrate survey weights?
Also, what are other definitions of calibration in statistics? I have heard it used in several contexts, particularly risk prediction (referring to whether the total number of predicted events in a…
AdamO
- 52,330
- 5
- 104
- 209