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- becuase it is more accurate.
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∙ 10y ago
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How does a census compare to a sample?
a census is the procedure of systematically acquiring and recording information about all d members of a given population and a sample is a group from d population a census is more thorough and gives accurate information about a population while being more expensive and comsuming time comsuing rather than a sample
Why is a large sample better than a small sample?
A large sample will reduce the effects of random variations.
What are the uses of sampling?
(1) A sample may save money (as compared with the cost of a complete census) when absolute precision is not necessary. (2) A sample saves time, when data are desired more quickly than would be possible with a complete census. (3) A sample may make it possible to concentrate attention on individual cases. (4) In industrial uses, some tests are destructive (for example, testing the length of time an electric bulb will last) and can only be performed on a sample of items. (5) Some populations can be considered as infinite, and can, therefore, only be sampled. A simple example is an agricultural experiment for testing fertilizers. In one sense, a census can be considered as a sample at one instant of time of an underlying causal system which has random features in it. (6) Where non-sampling errors are necessarily large, a sample may give better results than a complete census because non-sampling errors are easier to control in smaller-scale operations
Advantages of census over Sampling in Statistics?
There are several advantages of sampling over census (i.e. selection of wholepopulation for analysis).Firstly, the costs on sampling should be much lower than that on census. For example,for the government by-census (note: population census is usually conducted onceevery ten years and a by-census is conducted in the middle of the intercensal period),one fifth of the population is large enough to declare what the government wants toknow. There is no need to spend several times of dollars to interview the entirepopulation in the society.Secondly, a quality guru (Deming, 1960) argued that the quality of a study was oftenbetter with sampling than with a census. He suggested that, "Sampling possesses thepossibility of better interviewing(testing), more thorough investigation of missing,wrong , or suspicious information, better supervision, and better processing than ispossible with complete coverage". Research findings substantiate this opinion. Morethan 90% of survey error in one study was from non-sampling error1, and 10% or lesswas from sampling error2. (Donald et al., 1995)Thirdly, sampling can save the time. The speed of execution reduces the time betweenthe recognition of a need for information and the availability of that information.1 Non-sampling error is the error of research due to factors other than the sample size and samplingmethod, including non-response, bad communication with interviewees, measurement error, etc.2 Sampling error is the error during research due to the sample size and sampling method.
Why would having a larger sample size be a better idea than having a samll sample size when doing an experiment?
less bias and error occur when sample size is larger
How the sample survey is better than population survey?
It's not.
Why is a random sample better than a census?
A random sample is better than a census because it takes less time and costs less.
Why is conducting a sample survey preferable to conducting a census?
A sample survey may be preferable than a census because it can be more comprehensive. While its research only involves a subset, it is typically more accurate.
Why is a sample better than a census?
its better because we often don't have to survey a large population, so a sample is quicker, easier, requires few ressources, little time and can be more accurate if a person is not there to answer it because a sample could represent that person.
Merits and demerits of sample survey?
Merits: Quicker and cheaper than a census. Demerits: Estimates for population parameters are only approximate. These can be quite poor if sample is unrepresentative.
Survey sampling is better than census survey?
Only in terms of cost, time to complete, resources-those kinds of measures. A census provides complete information if done properly which is not possible with just a sample. A sample is always subject to sampling error.
Why do you think a survey is used more often than a census?
A survey is used more often than a census because a census requires everybody to respond, while a survey only needs a few people. This means a survey is advantageous for many reasons:It doesn't matter if not everyone responds, you can just survey more people.It is much cheaper to survey than hold a census.It is less effort to hold a survey than hold a census.It takes less time to hold a survey than hold a census.
What is total population survey?
It would be something like a census, surveying every last person in a given population rather than taking a random sample.
Which one is more accurance census or sample survey?
The census surveys all members of the population. If the objective of the survey is to find representative values of certain attributes, say how much does the average fisherman make in Alaska, then certainly a survey that includes all fisherman should be more accurate. If all members of the population are surveyed, then the resultant summary values would be considered parameters rather than statistics. For example:no statistical inference is made if I state there are 1,000 fisherman in Alaska, and a tally of all of them, shows their average income is $20,000. I can say that a census should be more accurate than a sample survey, provided all other factors are the same and precautions are taken to obtain reliable data. A census conducted in a biased manner will not provide accurate parameters.
Why is the second survey more believable than the first?
It is because the sample size for the second survey was larger.
How does a census compare to a sample?
a census is the procedure of systematically acquiring and recording information about all d members of a given population and a sample is a group from d population a census is more thorough and gives accurate information about a population while being more expensive and comsuming time comsuing rather than a sample
Why is a large sample better than a small sample?
A large sample will reduce the effects of random variations.
