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Sampling Errors: differences between your sample and the actual population that come about as a result of the observations that happened to be selected for the sample; (in sampling a population, regardless of how hard you try, there will always be some deviation from your sample as compared to your population because your sample may be slightly different from your population)

Non Sampling Error: differences due to mistakes in the acquisition of data or because of the improper formation of a sample.

  • Errors in data acquisition: i.e. recording the wrong answer, measurements from faulty equipment, mistakes in transferring info from primary sources, or misinterpretation of questions/responses, etc.
  • Non response errors: when people in the sample don't respond = no data
  • Selection bias: when sampling makes it highly unlikely that some people will be included in the sample (i.e. selecting only those who are in the phone book would eliminate the chances for someone who isn't in the phone book to be selected)
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What are the sources of sampling errors?

Sampling and Non sampling errors


Which one is called non probability sampling a. cluster sampling b.quota sampling c. systematic sampling d. stratified sampling?

Answer is Quota sampling. Its one of the method of non-probability sampling.


When is census necessary instead of sampling?

census is conducted for group data so if it is a sampling data is taken it would lead to lot of non sampling errors


What is sampling in research?

Sampling techniques in researching involves to types of sampling. The probability sampling and the non-probability sampling. Simple random is an example of probability sampling.


What are the causes of non-sampling errors?

non response, in accurate response and selection bias


What kind of errors arise in sampling?

sampling is a waste of time


What is non-probability sampling?

Non probability sampling is where the samples are not selected randomly.


What is the difference between random sampling and non random sampling?

a


Kinds of non random sampling technique?

Quota sampling.


What are the advantages of non probability sampling and probability sampling?

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Pros and Cons of non-probability sampling?

Pros and Cons of a non-probability sampling


What is sampling examine well known methods of probability and nonprobability sampling in statistic?

Non probability sampling and probability sampling are different because probability sampling uses random samples. Non probability sampling aren't random, but can still be representative of the population as a whole if done correctly.

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