Statistics - test statistics & p-values?

Update: I'm kind of confused with these testbook questions and was wondering if someone could walk me through them: 1. Find the approciate rejection regions for the large-sample test statistic z in these cases: a. A left-tailed test at the 1% significance level. b. A two-tailed test with α = 0.01 2. Find the... show more I'm kind of confused with these testbook questions and was wondering if someone could walk me through them:

1. Find the approciate rejection regions for the large-sample test statistic z in these cases:

a. A left-tailed test at the 1% significance level.
b. A two-tailed test with α = 0.01

2. Find the p-value for the following large-sample z tests:

a. A right-tailed test with observed z = 1.15
b. A two-tailed test with observed z=-2.78
c. A left-tailed test with observed z=0.81
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