6. For a two-tailed test with α = 0.05, what are the cutoff t values for a t-distribution with df = 30?

 

7. What is the relationship between sample size and cutoff t values?

 

8. Other factors kept constant, is it easier to reject the null hypothesis in a Z-test of a sample mean or a single-sample t-test?

Other factors kept constant, is it easier to reject the null hypothesis in a Z-test of a sample mean or a single-sample t-test?

For a two-tailed test with α = 0.05, what are the cutoff t values for a t-distribution with df = 9?

For a two-tailed test with α = 0.05, what are the cutoff t values for a t-distribution with df = 30?

What is the relationship between sample size and cutoff t values?