Assuming = .05, what is the critical value in each of the following t distributions? 1. df = 10, two-tailed test 2. df =

Assuming α = .05, what is the critical value in each of the following t distributions?

1. df = 10, two-tailed test 2. df = 30, one-tailed test (lower-tail critical)

3. df = ∞, two-tailed test 4. df = 15, one-tailed test (upper-tail critical)