t-test

**t-Test**

A t-test, also known as Student's t-test, is a statistical hypothesis test used to determine if there is a significant difference between the means of two groups. It is commonly employed when working with small sample sizes and normally distributed data. The t-test helps researchers assess whether the observed differences between the groups are likely to have occurred by chance or if they are statistically significant. Here are some key points about t-tests:

**Types of t-Tests:**

1. **Independent Samples t-Test:** This type of t-test is used when you want to compare the means of two independent or unrelated groups to determine if there is a significant difference between them. For example, you might use an independent samples t-test to compare the average test scores of students from two different schools.

2. **Paired Samples t-Test:** Also known _________ ________ __________ ______ ______ ______ _________ _____ ____ __________.
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