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Questions tagged [standard-error]

For basic questions in statistics involving the properties or use of standard error of the sample points present in a simple random sample.

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How can we calculate the standard error from a single sample?

Say we sample 19 dolphins for mercury levels. Say the summary of the sample is here: So the mean is 4.4 and the sample's standard deviation is 2.3 From this, why do we say the standard error (which ...