Keyword Analysis & Research: bias


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How do you determine bias?

The bias can be calculated for each election by subtracting the actual result from the poll prediction. The average bias of the polling method used can be calculated by finding the average of the individual errors. If the bias is large and consistent, the polling company can try to find out why their method is biased.

What is the cause of bias?

A common cause of sampling bias lies in the design of the study or in the data collection procedure, both of which may favor or disfavor collecting data from certain classes or individuals or in certain conditions.


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