Can someone please help me with finding these critical t scores.
1. What is the positive critical t score for a two-tailed test with an alpha of .10 an an N of 31?
2. What is the negative critical t score for a two-tailed test with an alpha of .10 and an N of 31?
3. What is the critical t score for a positive one-tailed test with an alpha of .01 and an N of 31?
4. What is the critical t score for a negative one-tailed test with an alpha of .05 and an N of 61?