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What is a survey of a representative sample of the population called?
Wiki User
∙ 12y ago
Random selection.
Wiki User
∙ 12y ago
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Why is the second survey more believable than the first?
It is because the sample size for the second survey was larger.
You'll need to select a sample that represents a larger group when you're conducting?
Survey research
What is a self-selected survey?
A self-selected sample survey is when the surveyer choses who he or she wants to ask the survey question to. So, the people surveyed are not random at all. One problem with this is that the surveyer can easily manipulate results by asking a group of people specifically to get a certain result. For example, if I wanted to do a survey about abortion, and I wanted the results to be in favor of my liberal views, I might only survey people in a liberal coffee shop in Seattle. This is a self-selected survey.
Why does sampling error occur?
The list is very long! In sampling error, I include all aspects of data collection. Samples (and not the full population) are taken in observational and experimental studies. The sample size may be a problem. In some cases, it may impossible to correct. If I am studying some rare occurrence, say hurricanes with winds over 280 mph or incidences of mad cow disease, the number of observations is fixed. Other times, there is inadequate time or budget to sample adequately. Sampling error can occur because of the way a sample is taken. This is very true of marketing surveys, which may be taken at time when they are more likely to survey one segment of the population. Or they are taken in one location that is not representative of the general population. A voluntary survey, or convenience survey may also be biased. The manner in which questions are posed, can introduce bias. Inadequate quality checking also contributes to sampling error. This is true whether the data collection is done by humans, or instruments, such as a testing laboratory. If a particular instrument is improperly calibrated, all measurements can be questionable. Finally, there are many means of purposely introducing bias into collected data in order to show "factual evidence" of preconceived ideas. The time frame or location where data is to be collected may be done to build in a particular bias. You will probably find more examples by searching the internet.
Which survey is most likely affected by bias?
A convenience survey or a self-selection survey is most likely to be affected by bias
What is the difference between population survey and sample survey?
A population survey, better known as a census, entails the collection of each unit in the population. In sample survey information is collected from a subset of the population. The subset, or sample, needs to be selected carefully so that it is representative of the whole population and, if that requirement is met, statistics based on the sample are good estimators for the corresponding population parameters.
Why is it so important to have a representative sample?
If the sample is not representative of the population, then the characteristics of the sample are not the characteristics of the population. Example: If I want to estimate the percentage of the population that are men, and my sample is the school's football team, my estimate would be that 100% of the population is comprised of men. What went wrong with my survey ? Simple. The football team is not a representative sample of the population, at least not as regards gender.
You decide to select ten percent of the inmates in a prison to receive a survey. You decide you want your sample to be representative of the population. Which sampling process would provide the most representative sample?
a stratified random sample
Can a standard deviation of a sample be less than a standard deviation of a population?
Sure it can. But in the survey business, the trick is to select your sample carefully so that they'll be equal, i.e. a sample that is accurately representative of the population.
What process is used to make sure that survey participants are a representative sample of the population that is being studied?
double-blind selection
In a survey psychologists select a random sample of research participants in order to ensure?
the participants are representative of the population they are interested in studying
When researchers survey part of a large group what is the name of the group that they survey?
A sample! And the large group is called the population.
How the sample survey is better than population survey?
It's not.
A survey of the survey of survey of?
The collection of information from a common group through interviews or the application of questionnaires to a representative sample of that group.
You decide to select ten percent of the inmates in a prison to receive a survey You decide you want your sample to be representative of the population Which sampling process would provide the most r?
a stratified random sample
You decide to select ten percent of the inmates in a prison to receive a survey. You decide you want your sample to be representative of the population. Which sampling process would provide the most r?
a stratified random sample
What is the difference between a sample and a census?
A Census is the type of survey for a complete population. A Sample Survey is only a portion of the population which is used to make predictions on the representation of the actual population.
