Consider a one-mean z-test. Denote z0 as the observed value of the test statistic z. If the

Question:

Consider a one-mean z-test. Denote z0 as the observed value of the test statistic z. If the test is right tailed, then the P-value can be expressed as P(z ≥ z0). Determine the corresponding expression for the P-value if the test is
a. Left tailed.
b. Two tailed.