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Sagot :
To perform a hypothesis test we use students' t distribution.
What is a hypothesis test?
A statistical hypothesis test is a technique for determining if the available data are sufficient to support a specific hypothesis. We can make probabilistic claims regarding population parameters thanks to hypothesis testing.
Here, we have
Given, the population mean is 13. the sample mean is 12.8, and the sample standard deviation is two. the sample size is 20.
We have to find distribution to perform a hypothesis test.
The students t distribution is used when
1- sample size less than 30. Here 20.
2-population standard deviation not given.
3-population is normal.
Hence, we concluded that to perform a hypothesis test we use students' t distribution.
To learn more about the hypothesis test from the given link
https://brainly.com/question/15980493
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