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§Standard Error Calculation
This module implements the standard error calculation, which measures the precision of the sample mean as an estimate of the population mean.
§Mathematical Definition
The standard error is defined as:
SE = σ / √n
where:
- σ is the sample standard deviation
- n is the sample size
§Key Properties
- Decreases as sample size increases
- Measures the variability of the sample mean
- Used in confidence intervals and hypothesis testing
Functions§
- std_err
- Calculate the standard error of a dataset