Answer to Question #348513 in Statistics and Probability for Jcanne

Question

1. Find the t-value that the area in the right tail is 0.10 with 25 degrees of freedom.

2. Find the t-value that the area in the right tail is 0.05 with 30 degrees of freedom.

3. What is the area of the region to the left of t=1.055 with n=30?

4. What is the area of the region to the right of t = 0.687 with df =20?

Answer 1

1.

$$t=1.316345$$

2.

$$t=1.697261$$

3.

The area in the left tail is $0.15$ with 30 degrees of freedom

4.

The area in the right tail is $0.25$ with 20 degrees of freedom