Find the critical value of Students t for each hypothesis test.

Question

Find the critical value of Students t for each hypothesis test.

1. 10 percent level of significant, two-tailed test, n=21

2. 1 percent level of significant, right-tailed test, n=9

3. 5 percent level of significant, left-tailed test, n=28

4. 2 percent level of significant, two-tailed test, n=55

5. 0.5 percent level of significant, left-tailed test, n=4

6.Find the critical value of t for a 90% confidence when the sample size 14.

7. Find the critical value of t for a 80% confidence when the sample size is 36.

8. Find the critical value of t for 99% confidence when the sample size is 20.

9. Find the critical value of t for the 98% confidence when the sample size is 100.

10. Find the critical value of t for a 80% confidence when the sample size is 11.

Answer 1

For two-tailed test critical value is +/- alpha/2 value for n-1 DOF

For right tailed test critical value is +alpha value for n-1 DOF

For left tailed test critical value is -alpha value for n-1 DOF

For confidence interval critical value is alpha/2 value for n-1 DOF

If can't find DOF in table use value for next lowest DOF in table