A two-tailed test was conducted with the null and alternative hypotheses stated being H₀: p = .69 against H_a: p ≠ .69, respectively, with a sample size of 150. The test results were z = -.98 and two-tailed p-value = .327

a. Determine the conditions required for a valid largesample test.

b. How would the p-value change if the alternative hypothesis was one-tailed, H_a: p < .69 at a 5% significance level? Interpret this p-value.