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Earn +20 ptsQ: How to decrease margin of error in probability sampling?
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What is sampling error?
Sampling errors are errors in the data collected during the carrying out of quantitative data surveys. They can occur for various reasons, e.g. surveys that were incorrectly filled out. It is generally said that a survey needs to have a margin of error of under 3% to be statistically significant.
Does increasing the margin of error decrease the length of the confidence interval?
It depends on whether it is the Type I Error or the Type II Error that is increased.
Sampling error can be reduced by?
Sampling error can be reduced by
How does Increasing the sample size while keeping the same confidence level has what effect on the margin of error?
The margin of error is reduced.
What amount of sampling error is acceptable in a national sample of 1500 to 3000 respondents?
There can be no set value. An acceptable level of sampling error for a company making high precision machine parts is likely to be very different from the sampling error for household incomes, for example.
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