Consider the following hypothesis tests for the population mean with s known. Compute the p-value for each test and decide whether you would reject or fail to reject the null hypothesis at a = 0.05:
H0: μ ≤ 15, Ha: μ > 15, z = 1.58
H0: μ ³ 1.9, Ha: μ < 1.9, z = -2.25
H0: μ = 100, Ha: μ ≠ 100, z = 1.90