State the critical values for a one-sample t test given the following conditions: 1. Two-tailed test, = .05, n = 12 2. One-tailed test,

State the critical values for a one-sample t test given the following conditions:

1. Two-tailed test, α = .05, n = 12 2. One-tailed test, lower-tail critical, α = .01, df = 15 3. Two-tailed test, α = .01, df = 26 4. One-tailed test, upper-tail critical, α = .05, n = 30