Teste Z para Proporção
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
z = (p̂−p₀)/√(p₀(1−p₀)/n)
About this calculator
The Z Test for Proportion Calculator is a useful tool for statisticians and researchers. It allows for the calculation of the Z value for a sample proportion, considering the known population proportion and the sample size.
With this calculator, you can evaluate if the sample proportion is significantly different from the population proportion. This is especially useful in research studies, where it's essential to check if the observed differences are real or just the result of chance.
The formula used by the calculator is z = (p̂ − p₀)/√(p₀(1−p₀)/n), where p̂ is the sample proportion, p₀ is the population proportion, and n is the sample size. It's essential to be careful when using this calculator, as selecting incorrect parameters can lead to inaccurate results.
Frequently asked questions
What is the Z Test for Proportion?
The Z Test for Proportion is a statistical technique used to evaluate if the sample proportion is significantly different from the population proportion. It's especially useful in research studies.
When should I use the Z Test for Proportion calculator?
Use the Z Test for Proportion calculator when you need to evaluate if the sample proportion is significantly different from the population proportion. This is especially useful in research studies, where it's essential to check if the observed differences are real or just the result of chance.
What is the population proportion (p₀) and how is it used?
The population proportion (p₀) is the proportion of the population that possesses a certain characteristic. It's used as a parameter in the calculation of the Z Test for Proportion. It's essential to have a precise estimate of the population proportion to obtain accurate results.