# Top 5 what does a t test tell you best, you should know

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## 1 How t-Tests Work: t-Values, t-Distributions, and Probabilities • Author: statisticsbyjim.com
• Published Date: 11/10/2021
• Review: 4.97 (871 vote)
• Summary: T-tests are statistical hypothesis tests that you use to analyze one or two sample means. Depending on the t-test that you use, you can compare a sample
• Matching search results: The tricky thing about t-values is that they are a unitless statistic, which makes them difficult to interpret on their own. Imagine that we performed a t-test, and it produced a t-value of 2. What does this t-value mean exactly? We know that the sample

## 2 An introduction to t-tests • Author: scribbr.com
• Published Date: 06/24/2022
• Review: 4.8 (959 vote)
• Summary: A t-test is a statistical test that is used to compare the means of two groups . It is often used in hypothesis testing to determine whether a process or treatment actually has an effect on the population of interest, or whether two groups are different from one another
• Matching search results: The difference in petal length between iris species 1 (Mean = 1.46; SD = 0.206) and iris species 2 (Mean = 5.54; SD = 0.569) was significant (t (30) = − 33.7190; p < 2.2e-16).

## 3 Understanding t-Tests: t-values and t-distributions • Author: blog.minitab.com
• Published Date: 06/07/2022
• Review: 4.81 (785 vote)
• Summary: · T-tests are handy hypothesis tests in statistics when you want to compare means. You can compare a sample mean to a hypothesized or target
• Matching search results: T-tests are handy hypothesis tests in statistics when you want to compare means. You can compare a sample mean to a hypothesized or target value using a one-sample t-test. You can compare the means of two groups with a two-sample t-test. If you have two

## 4 T Test (Student’s T-Test): Definition and Examples • Author: statisticshowto.com
• Published Date: 07/28/2022
• Review: 4.94 (676 vote)
• Summary: The t test tells you how significant the differences between group means are. It lets you know if those differences in means could have happened by chance
• Matching search results: Step 8: In conclusion, compare your t-table value from Step 7 (2.228) to your calculated t-value (-2.74). The calculated t-value is greater than the table value at an alpha level of .05. In addition, note that the p-value is less than the alpha level: p

## 5 T-Test: What It Is With Multiple Formulas and When To Use Them • Author: investopedia.com
• Published Date: 06/19/2022
• Review: 4.9 (850 vote)
• Summary: A t-test is an inferential statistic used to determine if there is a significant difference between the means of two groups and how they are related
• Matching search results: Degrees of Freedom = n 1 + n 2 − 2 where: n 1  and  n 2 = Number of records in each sample set begin{aligned} &text{Degrees of Freedom} = n1 + n2 – 2 \