A one-sample t-test is used to determine whether a sample comes from a population with a specific mean. This calculator uses the Student's T-distribution, which is ideal when the population standard deviation is unknown or the sample size is small.
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Pro Tips
Use this test when you don't know the population standard deviation.
Ensure your sample is randomly selected and the observations are independent.
A rule of thumb is to use Z-test for n > 30, but T-test is technically more accurate for any sample size.
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Fun Facts
"The T-test was developed by William Sealy Gosset, who worked for the Guinness Brewery. He published under the pen name 'Student'."
"As the sample size increases, the T-distribution looks more and more like a Normal (Z) distribution."
"The T-test is 'robust', meaning it can often give reliable results even if the data isn't perfectly normally distributed."
