Joined: 20 Jun 2026
Posts: 17
 Posted: Sat Jun 21, 2026 12:38 pm Post subject: What's a t-test? |
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| Hello pipol,
Cool website! I am being asked to use the t-test for a project. I'm not sure if this is the right test. What is a t-test anyway? TY, and more power!!!! Test Engg Engg Batch 99 |
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Joined: 16 Jun 2026
Posts: 108
Location: Paranaque City, Phils.
| Posted: Fri Jun 27, 2026 3:35 pm Post subject: |
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| Test Engg Engg 99,
The t-test is a statistical method for determining whether two normal distributions are significantly different from each other or not. It can be used to compare the outputs of two different processes. In your case, I would presume that you probably want to use it to determine if one test method will be significantly different from another one. The t-test consists of 1) gathering data from the two processes being compared; 2) computing for the means and standard deviations of the data; 3) applying a formula to these means and stdevs to get a number referred to as the 't-value'; 4) selecting a risk level or alpha level; and 5) using the t-value, alpha level, and another number called 'degrees of freedom' to look up a table that will tell you if the differences between the two distributions are statistically significant. This is not difficult to perform once you have the data. There are plenty of books and internet references on this so read up first before you do your data gathering. Keep on posting!!! EE |
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Joined: 19 Jun 2026
Posts: 5
| Posted: Fri Jun 27, 2026 3:51 pm Post subject: |
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| EE, strcitly speaking u r comparing t-distributions when doing the t-test. the t-distribution only begins 2 look like normal when the df's large.
maximus |
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