Can someone please help me with finding these critical z scores.
1. What is z (critical) for a positive one-tailed test with an alpha of .05?
2. What is z (critical) for a negative one-tailed test with an alpha of .01?
3. What is the positive z (critical) value for a two-tailed test with an alpha of .10?
4. What is the negative z (critical) value for a two-tailed test with an alpha of .10?