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What is the difference between Sampling error vs sampling bias?
Sampling error leads to random error. Sampling bias leads to systematic error.
What can be done to reduce bias in sampling?
The thing that can be done to reduce bias is sampling random things
What are the major source of sampling error?
The major source of sampling error is sampling bias. Sampling bias is when the sample or people in the study are selected because they will side with the researcher. It is not random and therefore not an adequate sample.
Advantages and disadvantages of simple random sampling?
advantages: reduce bias easy of sampling disadvantages: sampling error time consuming
What is intentional Bias?
Unintentional bias means the source of the bias is in the data collection or sampling method. Its not done purposefully, but rather ignorantly.
What is bias sample?
Sampling bias occurs when the sampling frame does not reflect the characteristics of the population which is being tested. Biased samples can result from problems with either the sampling technique or the data-collection method. Essentially, the group does not reflect the population which is supposed to be represented in the given survey or test. For example: If the question being asked in a survey was "do American's prefer Coca-Cola or Pepsi?" and all people asked were under 18 and from California, there would be a sampling bias as the sampling frame would not accurately represent "American's".
What is the difference between the sample mean and the population mean known as?
Sampling bias.
Sampling error refers to?
Sampling error occurs when the sampling protocol does not produce a representative sample. It may be that the sampling technique over represented a certain portion of the population, causing sample bias in the final study population.
What are the causes of non-sampling errors?
non response, in accurate response and selection bias
Why systematic sampling is not good for periodic data?
It checks bias in subsequent selections of samples
What is the purpose of random sampling in a poll?
Random sampling ensures that a bias in the sampled subjects is avoided. It allows for a diverse and fairly chosen sample of the intended population.
When you sample with replacement are the trials independent?
They are, if the sampling and replacement processes don't introduce any bias.
