Erro Bootstrap (aprox)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The Bootstrap Error (approx) calculator is a useful tool for estimating the error of a sample. It uses the formula SE ≈ σ/√n, where σ is the population standard deviation and n is the sample size.
This calculator is ideal for cases where you need to estimate the error of a sample before conducting a more in-depth sample study. For example, in public opinion surveys or product performance evaluations.
It is essential to remember that the formula SE ≈ σ/√n assumes that the sample is random and independent, and that the population standard deviation is known or estimated accurately.
Additionally, it is crucial to consider additional precautions when using this calculator, such as the possibility of under- or over-estimating the error, depending on the sample size and population standard deviation.
Frequently asked questions
What is the formula SE ≈ σ/√n?
The formula SE ≈ σ/√n is an approximate estimate of the error of a sample, based on the population standard deviation and sample size.
When should I use this calculator?
Use this calculator when you need to estimate the error of a sample before conducting a more in-depth sample study, such as in public opinion surveys or product performance evaluations.
What is the ideal sample size for this calculator?
There is no ideal sample size, but it is generally recommended to have a large enough sample size for the error estimate to be accurate.
What is the population standard deviation?
The population standard deviation is a measure of the spread of data in a population, and is essential for calculating the error of a sample.
Can this calculator be used for all types of samples?
No, this calculator assumes that the sample is random and independent, and that the population standard deviation is known or estimated accurately.