QUESTION 10 The confidence interval method for hypothesis testing at the 95% level) relies on the fact that O a. percent of all confidence intervals that could be constructed contain the true value of the unobserved population parameter. b. the observed sample statistic is correct 95 percent of the time. c. there is a 95 percent chance that the calculated confidence interval contains the true value of the unobserved population parameter O d.95 percent of all sample statistics are correct