13. If the p-value is less than 0.05 in the test of the population parameter H: p=0.5 , then a. A 95% confidence interval for will definitely include 0.5. b. A 95% confidence interval might contain 0.5. c. A 95% confidence interval will contain 0.3 exactly 62.43% of the time. d. A 95% confidence interval contains 1.645