How many subjects should be used for a t test?

A small enough sample size is not necessary for a t-test to be reliable. In actuality, four people were the smallest sample size ever utilized for a t-test. If the t-presumptions test's conditions are not met, the results, however, could not be reliable.

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22 May 2023

The Importance of Sample Size in T-Tests

Sample size is a critical factor in the reliability of statistical tests, including t-tests. The number of subjects used in a t-test can greatly impact the accuracy and validity of the results. While some may believe that a larger sample size is always better, the reality is that even a small sample size can provide meaningful insights if the test assumptions are met.

When it comes to t-tests, the minimum number of subjects required can vary depending on the specific study design and objectives. In some cases, as mentioned, only four subjects were used for a t-test. However, it is crucial to ensure that the assumptions of the test are verified to avoid drawing erroneous conclusions.

Therefore, while there is no fixed rule for the exact number of subjects needed for a t-test, it is essential to consider the test's assumptions and validity to determine the appropriate sample size for reliable results.

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The Importance of Sample Size in T-Tests

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