What is...

Standard error (SE)

In market research, the standard error (SE) is the estimated standard deviation of the sampling distribution of a statistic. It indicates the reliability of the mean, by showing how accurately a sample represents the total population. In statistics, any sample mean deviates from the actual mean of a population, and the standard error tells us how confident we can be in the observed sample mean. A larger sample size usually results in a smaller standard error.

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